Gaya APA

MacKenzie, N., John, I, P, R, I, S. (1975). Open learning: system and problems in post-secondary education . Paris: Paris: The Unesco Press; 1975.

Gaya MLA

MacKenzie, Norman., John, I., Postgate,, Richmond, II., Scupham,. "Open learning: system and problems in post-secondary education". Paris: Paris: The Unesco Press; 1975, 1975. Text.