APA (7th ed.) Citation

Allen, F. S. (1921). Allen's synonyms and antonyms. Harper & brothers.

Chicago Style (17th ed.) Citation

Allen, Frederic Sturges. Allen's Synonyms and Antonyms. New York: Harper & brothers, 1921.

MLA (9th ed.) Citation

Allen, Frederic Sturges. Allen's Synonyms and Antonyms. Harper & brothers, 1921.