Levi, H. (1960). Foundations of geometry and trignometry. Prentice Hall.
Chicago Style aipamenaLevi, Howard. Foundations of Geometry and Trignometry. Englewood Cliffs: Prentice Hall, 1960.
MLA aipamenaLevi, Howard. Foundations of Geometry and Trignometry. Prentice Hall, 1960.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.