APA način citiranja

Vargas Vargas, G., & Gamboa Araya, R. (2013). The Van Hiele model and the teaching of the geometry.

Čikaški stil citiranja

Vargas Vargas, Gilberto, i Ronny Gamboa Araya. The Van Hiele Model and the Teaching of the Geometry. 2013.

MLA način citiranja

Vargas Vargas, Gilberto, i Ronny Gamboa Araya. The Van Hiele Model and the Teaching of the Geometry. 2013.

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