Dyfyniad APA

Coleman, R. (1972). The development of informal geometry. AMS Press.

Dyfyniad Arddull Chicago

Coleman, Robert. The Development of Informal Geometry. [New York: AMS Press, 1972.

Dyfyniad MLA

Coleman, Robert. The Development of Informal Geometry. AMS Press, 1972.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.