Cita APA (7th ed.)

Williams, C. B. A research manual for college studies and papers. Harper & Brothers, c1951.

Cita Chicago (17th ed.)

Williams, Cecil B. A Research Manual for College Studies and Papers. New York: Harper & Brothers, c1951.

Cita MLA (9th ed.)

Williams, Cecil B. A Research Manual for College Studies and Papers. Harper & Brothers, c1951.