Παραπομπή APA

Usmen, M. A., & Acar, Y. B. (1992). Environmental geotechnology. A.A. Balkema.

Παραπομπή Chicago Style

Usmen, Mumtaz A., και Yalcin B. Acar. Environmental Geotechnology. Netherlands: A.A. Balkema, 1992.

Παραπομπή MLA

Usmen, Mumtaz A., και Yalcin B. Acar. Environmental Geotechnology. A.A. Balkema, 1992.