Gaya APA

Ph.D, A, F, W. (1977). Theory And Problems Of Psychology Of Learning : Schaum Outlines Series . New York: McGraw - Hill Book Company.

Gaya MLA

Ph.D, Arno, F., Wittig,. "Theory And Problems Of Psychology Of Learning : Schaum Outlines Series". New York: McGraw - Hill Book Company, 1977. Text.