Cita APA (7th ed.)

Keedy, M. L., & Nelson, C. W. (1973). Geometry: A modern introduction (2a. ed.). Addison-Wesley.

Cita Chicago (17th ed.)

Keedy, Mervin L., i Charles W. Nelson. Geometry: A Modern Introduction. 2a. ed. Reading: Addison-Wesley, 1973.

Cita MLA (9th ed.)

Keedy, Mervin L., i Charles W. Nelson. Geometry: A Modern Introduction. 2a. ed. Addison-Wesley, 1973.