Cita APA (7th ed.)

Hobbs, J. A., & Duncan, R. L. (1989). Arts, ideas, and civilization (North and South American ed.). Prentice-Hall.

Cita Chicago (17th ed.)

Hobbs, Jack A., i Robert L. Duncan. Arts, Ideas, and Civilization. North and South American ed. Englewood Cliffs, N.J: Prentice-Hall, 1989.

Cita MLA (9th ed.)

Hobbs, Jack A., i Robert L. Duncan. Arts, Ideas, and Civilization. North and South American ed. Prentice-Hall, 1989.