Παραπομπή APA

Frater, H. (1998). Landforms of the earth: Cause, course, effect, animation. Springer electronic media.

Παραπομπή Chicago Style

Frater, Harald. Landforms of the Earth: Cause, Course, Effect, Animation. Berlin: Springer electronic media, 1998.

Παραπομπή MLA

Frater, Harald. Landforms of the Earth: Cause, Course, Effect, Animation. Springer electronic media, 1998.