Cita APA (7th ed.)

Godfrey, C., & Siddons, A. W. (1908). Modern geometry. Cambridge University.

Cita Chicago (17th ed.)

Godfrey, Charles, i A. W. Siddons. Modern Geometry. Cambridge: Cambridge University, 1908.

Cita MLA (9th ed.)

Godfrey, Charles, i A. W. Siddons. Modern Geometry. Cambridge University, 1908.