Dyfyniad APA

BOHN, H. L., McNEAL, B. L., & O'CONNOR, G. A. (1979). Soil chemistry. John Wiley and Sons.

Dyfyniad Arddull Chicago

BOHN, Hinrich L., Brian L. McNEAL, and George A. O'CONNOR. Soil Chemistry. New York: John Wiley and Sons, 1979.

Dyfyniad MLA

BOHN, Hinrich L., et al. Soil Chemistry. John Wiley and Sons, 1979.

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