Cita APA

Sigler, L., & Sigler, L. (1976). Exercises in set theory. New York, New York: Springer.

Citación estilo Chicago

Sigler, L.E., y L.E Sigler. Exercises in Set Theory. New York, New York: Springer, 1976.

Cita MLA

Sigler, L.E., y L.E Sigler. Exercises in Set Theory. New York, New York: Springer, 1976.