Dyfyniad APA

Sprent, J. I., & Sprent, P. (1990). Nitrogen fixing organisms: Pure and Applied Aspects. Chapman and Hall.

Dyfyniad Arddull Chicago

Sprent, Janet I., and Peter Sprent. Nitrogen Fixing Organisms: Pure and Applied Aspects. London ; New York: Chapman and Hall, 1990.

Dyfyniad MLA

Sprent, Janet I., and Peter Sprent. Nitrogen Fixing Organisms: Pure and Applied Aspects. Chapman and Hall, 1990.

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