APA (7th ed.) Citation

Thomas, C. K. (1958). An introduction to the phonetics of American english (2nd ed.). The Ronald Press Company.

Chicago Style (17th ed.) Citation

Thomas, Charles Kenneth. An Introduction to the Phonetics of American English. 2nd ed. New York: The Ronald Press Company, 1958.

MLA (9th ed.) Citation

Thomas, Charles Kenneth. An Introduction to the Phonetics of American English. 2nd ed. The Ronald Press Company, 1958.