Cita APA (7a ed.)

Beatty, J. L., & Johnson, O. A. (1991). Heritage of western civilization (7th ed.). Prentice-Hall.

Cita Chicago Style (17a ed.)

Beatty, John Louis, y Oliver A. Johnson. Heritage of Western Civilization. 7th ed. Englewood Cliffs, N.J: Prentice-Hall, 1991.

Cita MLA (9a ed.)

Beatty, John Louis, y Oliver A. Johnson. Heritage of Western Civilization. 7th ed. Prentice-Hall, 1991.