Usmen, M. A., & Acar, Y. B. (1992). Environmental geotechnology. A.A. Balkema.
Chicago Style aipamenaUsmen, Mumtaz A., and Yalcin B. Acar. Environmental Geotechnology. Netherlands: A.A. Balkema, 1992.
MLA aipamenaUsmen, Mumtaz A., and Yalcin B. Acar. Environmental Geotechnology. A.A. Balkema, 1992.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.