APA (7. basım) Alıntı

Wallen, R. N. (1992). Introduction to physical geography. WM C. Brown.

Chicago Style (17. basım) Atıf

Wallen, Robert N. Introduction to Physical Geography. Boulevard: WM C. Brown, 1992.

MLA (9th ed.) Atıf

Wallen, Robert N. Introduction to Physical Geography. WM C. Brown, 1992.