APA aipamena

Siann, G., & Ugwuegbu, D. C. (1988). Educational psychology in a changing world (2nd ed.). Unwin Hyman.

Chicago Style aipamena

Siann, Gerda, and Denis C.E Ugwuegbu. Educational Psychology in a Changing World. 2nd ed. London: Unwin Hyman, 1988.

MLA aipamena

Siann, Gerda, and Denis C.E Ugwuegbu. Educational Psychology in a Changing World. 2nd ed. Unwin Hyman, 1988.