Flesch, Rudolf, The Art of Plain Talk, New York: Harper & Brothers, 1946, 210 pp.
Graff, Willem L., Language and Languages: An Introduction to Linguistics, New York: D. Appleton & Co., 1932, 487 pp.
Hayakawa, S. I., Language in Action, New York: Harcourt, Brace & Co., 1941, 345 pp.
Jespersen, Otto, The Philosophy of Grammar, New York: Henry Holt & Co., 1929 (third printing), 359 pp.
Jespersen, Otto, Analytic Syntax,
In this book, by means of a well-contrived system of letters and signs, the great linguistic scholar Jespersen depicts all the important inter-relations of English words and parts of words in connected speech.
Ogden, C. K., The System of Basic English, New York: Harcourt, Brace & Co., 1934, 320 pp.
Schlauch, Margaret, The Gift of Tongues, New York: Modern Age Books, 1942, 342 pp.
Walpole, Hugh R., Semantics: The Nature of Words and Their Meanings, New York: W. W. Norton & Co., 1941, 264 pp.