Cita APA

Posamentier, A. S., & Salkind, C. T. n. 1. (1988). Challenging problems in geometry. New York: Dover.

Citación estilo Chicago

Posamentier, Alfred S., y Charles T. n. 1898 Salkind. Challenging Problems in Geometry. New York: Dover, 1988.

Cita MLA

Posamentier, Alfred S., y Charles T. n. 1898 Salkind. Challenging Problems in Geometry. New York: Dover, 1988.