If this writer happens to be the sole author of another work, then the form of reference is made to read

Wicker, George Ray.
— (Joint-Author). See also Ely, Richard T.

To give the reference in this form may seem to be a contradiction of the previous statement that the second author's name need not be turned about, but in this case it is necessary to point directly to the name Ely under which the entry is found.

An alternative style for both the above references so far as the use of capitals and punctuation is concerned is

Wicker, Geo. Ray (joint-author) see Ely,
Richard T.
Wicker, Geo. Ray.
— (joint-author) see also Ely, Richard T.

It must be borne in mind that whatever style is adopted should be strictly followed throughout.

An explanation concerning the collation (number of pages) is required. The book has six prefatory leaves, paged in Roman numerals, i. to xi., made up of the half-title and the title (both unpaged), three pages of preface (the second and third being marked vi., vii.), a blank page, three pages with a list of contents (the second and third are marked x., xi.), and a blank page, making twelve pages in all. Doubt will arise in a case of this kind as to whether the title leaves and the blank pages should be taken into account, but as the printer has seen fit to include them all in his pagination, the statement of these prefatory pages is better given as xii. The rest of the book is straightforward, being paged from 1 to 388.

A briefer form of author-entry is

Ely, R. T., and G. R. Wicker. Elementary
principles of economics; with a short sketch
of economic history. N.Y., 1910

The places of publication may be shortened in this way where the abbreviation used can be readily recognised—N.Y. for New York. Examples of other places will readily occur to the cataloguer, especially if they are in common use, as Edin. for Edinburgh, Dub. for Dublin, Oxf. for Oxford, Camb. for Cambridge, Manc. for Manchester, L'pool for Liverpool, and so on. The London Library Catalogue goes much further than this, and gives A. for Amsterdam, C. for Cambridge, D. for Dublin, L. for Leipzig, and other bare initials in the same way, though they are not consistently used. It not only omits London as the place of publication from English books, as already recommended herein, but carries out the idea to the exclusion of all capital cities in the cases of native published books, leaving Paris, Berlin, Madrid, to be taken as understood when these cities are the places of publication of French, German, and Spanish books respectively. In many ways the economies effected in the London Library Catalogue are notable, though so numerous that a considerable explanatory list has to be given in the preface. The book we are dealing with would appear in this style in the Author Catalogue