APA (7th ed.) Citation

Duffy, T. F. (1968). A controlled research project: American place names. Holt, Rinehart and Winston.

Chicago Style (17th ed.) Citation

Duffy, Thomas F. A Controlled Research Project: American Place Names. New York: Holt, Rinehart and Winston, 1968.

MLA (9th ed.) Citation

Duffy, Thomas F. A Controlled Research Project: American Place Names. Holt, Rinehart and Winston, 1968.