Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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