Citazione Stile APA (7a Edizione)

National Council of Teachers of Mathematics, U.S.A. (1970). Sugerencias para resolver problemas. Trillas.

Citazione stile Chigago Style (17a edizione)

National Council of Teachers of Mathematics, U.S.A. Sugerencias Para Resolver Problemas. Ciudad de México: Trillas, 1970.

Citatione MLA (9a ed.)

National Council of Teachers of Mathematics, U.S.A. Sugerencias Para Resolver Problemas. Trillas, 1970.