Παραπομπή APA

Lewis Beck, M., & Kafka, F. (1993). Basic statistics. Sage-Singapore : Toppan.

Παραπομπή Chicago Style

Lewis Beck, Michael, και Fritz Kafka. Basic Statistics. London: Sage-Singapore : Toppan, 1993.

Παραπομπή MLA

Lewis Beck, Michael, και Fritz Kafka. Basic Statistics. Sage-Singapore : Toppan, 1993.