APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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