Cita APA (7th ed.)

Broek, J. O. M., & Webb, J. W. (1968). A geography of mankind. McGraw-Hill.

Cita Chicago (17th ed.)

Broek, Jan Otto Marius, i John Winter Webb. A Geography of Mankind. New York: McGraw-Hill, 1968.

Cita MLA (9th ed.)

Broek, Jan Otto Marius, i John Winter Webb. A Geography of Mankind. McGraw-Hill, 1968.