Cita APA (7th ed.)

Aker, G. F., & Smith, R. M. (1970). Handbook of adult education. Macmillan.

Cita Chicago (17th ed.)

Aker, George F., i Robert M. Smith. Handbook of Adult Education. New York: Macmillan, 1970.

Cita MLA (9th ed.)

Aker, George F., i Robert M. Smith. Handbook of Adult Education. Macmillan, 1970.