APA (7th ed.) Citation

Colby, F. O. (1941). Your speech and how to improve it: A new and simplified method of correcting many of the common faults in the pronunciation and usage of the American language. The Vanguard press.

Chicago Style (17th ed.) Citation

Colby, Frank O. Your Speech and How to Improve It: A New and Simplified Method of Correcting Many of the Common Faults in the Pronunciation and Usage of the American Language. New York: The Vanguard press, 1941.

MLA (9th ed.) Citation

Colby, Frank O. Your Speech and How to Improve It: A New and Simplified Method of Correcting Many of the Common Faults in the Pronunciation and Usage of the American Language. The Vanguard press, 1941.