Cita APA (7a ed.)

Doerr, A. H. (1969). An introduction to economic geography. Wm. C. Brown.

Cita Chicago Style (17a ed.)

Doerr, Arthur H. An Introduction to Economic Geography. Dubuque [Iowa]: Wm. C. Brown, 1969.

Cita MLA (9a ed.)

Doerr, Arthur H. An Introduction to Economic Geography. Wm. C. Brown, 1969.