Cita APA (7a ed.)

Platt, N., & Drummond, M. J. (1967). Our world through the ages (3rd ed.). Prentice-Hall.

Cita Chicago Style (17a ed.)

Platt, Nathaniel, y Muriel Jean Drummond. Our World Through the Ages. 3rd ed. Englewood Cliffs, N.J.: Prentice-Hall, 1967.

Cita MLA (8a ed.)

Platt, Nathaniel, y Muriel Jean Drummond. Our World Through the Ages. 3rd ed. Prentice-Hall, 1967.