Tohutoro APA (7th ed.)

National Council of Teachers of Mathematics, U.S.A. (1970). Geometría informal. Trillas.

Tohutoru Kātū Chicago (17th ed.)

National Council of Teachers of Mathematics, U.S.A. Geometría Informal. Ciudad de México: Trillas, 1970.

Tohutoro MLA (9th ed.)

National Council of Teachers of Mathematics, U.S.A. Geometría Informal. Trillas, 1970.