G Harold. (1985). Erosion: Its causes and cure. International book distributors.
استشهاد بنمط شيكاغوG Harold. Erosion: Its Causes and Cure. New Delhi: International book distributors, 1985.
MLA استشهادG Harold. Erosion: Its Causes and Cure. International book distributors, 1985.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.