APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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