APA استشهاد

Bear, F. E. (1965). Soils in relation to crop growth. Reinhold Book Corporation.

استشهاد بنمط شيكاغو

Bear, Firman E. Soils in Relation to Crop Growth. Newyork: Reinhold Book Corporation, 1965.

MLA استشهاد

Bear, Firman E. Soils in Relation to Crop Growth. Reinhold Book Corporation, 1965.