Cita APA (7th ed.)

Spencer, T. D., & Kass, N. (1970). Perspectives in child psychology: Research and review. McGraw-Hill.

Cita Chicago (17th ed.)

Spencer, Thomas D., i Norman Kass. Perspectives in Child Psychology: Research and Review. New York: McGraw-Hill, 1970.

Cita MLA (9th ed.)

Spencer, Thomas D., i Norman Kass. Perspectives in Child Psychology: Research and Review. McGraw-Hill, 1970.