APA (7th ed.) Citation

National Council of Teachers of Mathematics, U.S.A. (1968). Números y sus factores. Trillas.

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

National Council of Teachers of Mathematics, U.S.A. Números Y Sus Factores. Trillas, 1968.

Warning: These citations may not always be 100% accurate.