Dyfyniad APA

(1988). Russell's soil conditions and plant growth. London: English language book society/ Longman.

Dyfyniad Arddull Chicago

Russell's Soil Conditions and Plant Growth. London: English language book society/ Longman, 1988.

Dyfyniad MLA

Russell's Soil Conditions and Plant Growth. London: English language book society/ Longman, 1988.

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