Cita APA (7th ed.)

Baerwald, T. J., & Fraser, C. (1993). Prentice Hall world geography. Prentice Hall.

Cita Chicago (17th ed.)

Baerwald, Thomas J., i Celeste Fraser. Prentice Hall World Geography. Upper Saddle River, N.J: Prentice Hall, 1993.

Cita MLA (9th ed.)

Baerwald, Thomas J., i Celeste Fraser. Prentice Hall World Geography. Prentice Hall, 1993.