Dyfyniad APA

Schwab, G. O. (1996). Soil and water management systems (4th ed.). New York: John Wiley and Sons.

Dyfyniad Arddull Chicago

Schwab, Glenn Orville. Soil and Water Management Systems. 4th ed. New York: John Wiley and Sons, 1996.

Dyfyniad MLA

Schwab, Glenn Orville. Soil and Water Management Systems. 4th ed. New York: John Wiley and Sons, 1996.

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