Cita APA (7th ed.)
Aker, G. F. (1965). Adult education procedures, methods and techniques.
Cita Chicago (17th ed.)
Aker, George F. Adult Education Procedures, Methods and Techniques. 1965.
Cita MLA (9th ed.)
Aker, George F. Adult Education Procedures, Methods and Techniques. 1965.
Atenció: Aquestes cites poden no estar 100% correctes.