Tohutoro APA (7th ed.)

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

Tohutoru Kātū Chicago (17th ed.)

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

Tohutoro MLA (9th ed.)

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