Παραπομπή APA

Laurence, P. N., & Lowrie, R. S. (1968). Multiple choice questions: Elementary Book [1]. Pergamon Press.

Παραπομπή Chicago Style

Laurence, P. N., και R. S. Lowrie. Multiple Choice Questions: Elementary Book [1]. Pergamon Press, 1968.

Παραπομπή MLA

Laurence, P. N., και R. S. Lowrie. Multiple Choice Questions: Elementary Book [1]. Pergamon Press, 1968.