Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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