Παραπομπή APA

Lyapin, E. S. (1972). Exercises in group theory. Plenum Press.

Παραπομπή Chicago Style

Lyapin, E S. Exercises in Group Theory. New York: Plenum Press, 1972.

Παραπομπή MLA

Lyapin, E S. Exercises in Group Theory. Plenum Press, 1972.