Cita APA (7th ed.)

National Council of Teachers of Mathematics, U.S.A. (1968). Números enteros. Trillas.

Cita Chicago (17th ed.)

National Council of Teachers of Mathematics, U.S.A. Números Enteros. Ciudad de México: Trillas, 1968.

Cita MLA (9th ed.)

National Council of Teachers of Mathematics, U.S.A. Números Enteros. Trillas, 1968.