APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

Levi, Howard. Foundations of Geometry and Trigonometry. Englewood Cliffs, N.J: Prentice-Hall, 1960.

MLA (9e ed.) Bronvermelding

Levi, Howard. Foundations of Geometry and Trigonometry. Prentice-Hall, 1960.