APA (7e ed.) Bronvermelding

- & KNAPP, B. [. (1981). Practical foundations of physical geograpgy. George Allaen and Unwin.

Chicago (17e ed.) Bronvermelding

- en Brian [Ed.] KNAPP. Practical Foundations of Physical Geograpgy. London: George Allaen and Unwin, 1981.

MLA (9e ed.) Bronvermelding

- en Brian [Ed.] KNAPP. Practical Foundations of Physical Geograpgy. George Allaen and Unwin, 1981.

Let op: Deze citaties zijn niet altijd 100% accuraat.