Cita APA (7th ed.)

Blumenthal, L. M. (1970). Studies in geometry. W. H. Freeman.

Cita Chicago (17th ed.)

Blumenthal, Leonard M. Studies in Geometry. San Francisco: W. H. Freeman, 1970.

Cita MLA (9th ed.)

Blumenthal, Leonard M. Studies in Geometry. W. H. Freeman, 1970.