Παραπομπή APA

Sigler, L. E. (1979). Exercises in set theory. Norosa.

Παραπομπή Chicago Style

Sigler, L E. Exercises in Set Theory. New Delhi: Norosa, 1979.

Παραπομπή MLA

Sigler, L E. Exercises in Set Theory. Norosa, 1979.