APA استشهاد

Montgomery, C. W. (2006). Environmetal geology (7th ed.). McGraw Hill.

استشهاد بنمط شيكاغو

Montgomery, Carla W. Environmetal Geology. 7th ed. Boston: McGraw Hill, 2006.

MLA استشهاد

Montgomery, Carla W. Environmetal Geology. 7th ed. McGraw Hill, 2006.