APA (7th ed.) Citation

Willis, M. (1961). The guinea pigs after twenty years: A follow-up study of the Class of 1938 of the University School, Ohio State. Ohio State University Press.

Chicago Style (17th ed.) Citation

Willis, Margaret. The Guinea Pigs After Twenty Years: A Follow-up Study of the Class of 1938 of the University School, Ohio State. Columbus: Ohio State University Press, 1961.

MLA (9th ed.) Citation

Willis, Margaret. The Guinea Pigs After Twenty Years: A Follow-up Study of the Class of 1938 of the University School, Ohio State. Ohio State University Press, 1961.