Dyfyniad APA

Kelley, W. C., & Thompson, H. C. (1957). Vegetable crops (5.). Mc Graw Hill Book company.

Dyfyniad Arddull Chicago

Kelley, W C., and H C. Thompson. Vegetable Crops. 5. NewYork: Mc Graw Hill Book company, 1957.

Dyfyniad MLA

Kelley, W C., and H C. Thompson. Vegetable Crops. 5. Mc Graw Hill Book company, 1957.

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