Cita APA (7th ed.)

Levi, H. (1960). Foundations of geometry and trignometry. Prentice Hall.

Cita Chicago (17th ed.)

Levi, Howard. Foundations of Geometry and Trignometry. Englewood Cliffs: Prentice Hall, 1960.

Cita MLA (9th ed.)

Levi, Howard. Foundations of Geometry and Trignometry. Prentice Hall, 1960.