Cita APA (7th ed.)

Veblen, O., & Young, J. W. (1946). Projective geometry. Blaisdell.

Cita Chicago (17th ed.)

Veblen, Oswald, i John Wesley Young. Projective Geometry. Nueva York: Blaisdell, 1946.

Cita MLA (9th ed.)

Veblen, Oswald, i John Wesley Young. Projective Geometry. Blaisdell, 1946.