Παραπομπή σε μορφή APA (7η εκδ.)

Mammana, C., & Villani, V. (1998). Perspectives on the teaching of geometry for the 21st century. Kluwer Academic Publishers.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Mammana, Carmelo, και Vinicio Villani. Perspectives on the Teaching of Geometry for the 21st Century. Dordrecht [Netherlands] ; Boston: Kluwer Academic Publishers, 1998.

Παραπομπή σε μορφή MLA (8th εκδ.)

Mammana, Carmelo, και Vinicio Villani. Perspectives on the Teaching of Geometry for the 21st Century. Kluwer Academic Publishers, 1998.