Manual of Style Governing Composition and Proof Reading in the Government Printing Office

by United States. Government Printing Office

Chief Engineer

Chaplain

4. Distinguishing titles and college degrees, following names, will always be contracted, as jr., sr., esq.; Ph. D., LL. D.; U. S. A., U. S. N. (See also under “[Capitalization].”)

Note.—The contractions “U. S. A.” and “U. S. N.,” for United States Army and United States Navy will be used when so written. When written “U. S. Army” or “U. S. Navy,” spell in full, as—

John L. Worden, U. S. N.

R. W. Meade, United States Navy.

N. A. Miles, U. S. A.

G. G. Crook, United States Army.

5. In parenthetic references to books use “p.” and “pp.” for page and pages, and “sec.” and “secs.” for section and sections.