Cita APA (7th ed.)

Leepa, A. (1961). The challenge of modern art. A.S. Barnes.

Cita Chicago (17th ed.)

Leepa, Allen. The Challenge of Modern Art. Nueva York: A.S. Barnes, 1961.

Cita MLA (9th ed.)

Leepa, Allen. The Challenge of Modern Art. A.S. Barnes, 1961.