Cita APA (7th ed.)

ALEXANDROFF, P., PERFECT, H., & PETERSEN, G. M. (1959). Introduction to the theory of groups. Blackie.

Cita Chicago (17th ed.)

ALEXANDROFF, P.S, Hazel PERFECT, i G. M. PETERSEN. Introduction to the Theory of Groups. London: Blackie, 1959.

Cita MLA (9th ed.)

ALEXANDROFF, P.S, et al. Introduction to the Theory of Groups. Blackie, 1959.