APA (7e ed.) Bronvermelding

ALEXANDER, J. W., & GIBSON, L. J. (1979). Economic geography.-- ed.2. Prentice Hall.

Chicago (17e ed.) Bronvermelding

ALEXANDER, John W., en Lay James GIBSON. Economic Geography.-- Ed.2. London: Prentice Hall, 1979.

MLA (9e ed.) Bronvermelding

ALEXANDER, John W., en Lay James GIBSON. Economic Geography.-- Ed.2. Prentice Hall, 1979.