Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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