Dyfyniad APA

Norman, A. G., & Pierre, W. H. (1953). Soil and fertilizers phosphorous in crop nutrition. Academic press.

Dyfyniad Arddull Chicago

Norman, A G., and W H. Pierre. Soil and Fertilizers Phosphorous in Crop Nutrition. Newyork: Academic press, 1953.

Dyfyniad MLA

Norman, A G., and W H. Pierre. Soil and Fertilizers Phosphorous in Crop Nutrition. Academic press, 1953.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.