APA (7th ed.) Citation

National Council of Teachers of Mathematics, U.S.A. (1968). Proposiciones numéricas. Trillas.

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

National Council of Teachers of Mathematics, U.S.A. Proposiciones Numéricas. Trillas, 1968.