APA ציטוט

Birkhoff, G. D., & Beatley, R. (1959). Basic geometry (3rd ed.).

Chicago Edition Citation

Birkhoff, George David, and Ralph Beatley. Basic Geometry. 3rd ed. 1959.

ציטוט MLA

Birkhoff, George David, and Ralph Beatley. Basic Geometry. 3rd ed. 1959.