Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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