Cita APA (7th ed.)

Williams, S. P. (1975). Guide to the research collections of the New York Public Library. American Library Association.

Cita Chicago (17th ed.)

Williams, Sam P. Guide to the Research Collections of the New York Public Library. Chicago: American Library Association, 1975.

Cita MLA (9th ed.)

Williams, Sam P. Guide to the Research Collections of the New York Public Library. American Library Association, 1975.