Citazione Stile APA (7a Edizione)

Busemann, H., & Kelly, P. J. (1953). Projective geometry and projective metrics. Academic Press.

Citazione stile Chigago Style (17a edizione)

Busemann, Herbert, e Paul J. Kelly. Projective Geometry and Projective Metrics. Nueva York: Academic Press, 1953.

Citatione MLA (9a ed.)

Busemann, Herbert, e Paul J. Kelly. Projective Geometry and Projective Metrics. Academic Press, 1953.