APA-referens (7:e uppl.)

DOORKAMP, J. C., & KING, C. A. (1971). Numerical analysis in geomorphology an introduction. Butler and Tanner.

Chicago-referens (17:e uppl.)

DOORKAMP, John C., och Cuchlaine A.M KING. Numerical Analysis in Geomorphology an Introduction. London: Butler and Tanner, 1971.

MLA-referens (9:e uppl.)

DOORKAMP, John C., och Cuchlaine A.M KING. Numerical Analysis in Geomorphology an Introduction. Butler and Tanner, 1971.