Dyfyniad APA

Donahue, R. L., Miller, R. W., & Shickluna, J. C. (1977). Soils: An introduction to soils and plant growth (4th edition.). National Book Store.

Dyfyniad Arddull Chicago

Donahue, Roy Luther, Raymond W. Miller, and John C. Shickluna. Soils: An Introduction to Soils and Plant Growth. 4th edition. Manila: National Book Store, 1977.

Dyfyniad MLA

Donahue, Roy Luther, et al. Soils: An Introduction to Soils and Plant Growth. 4th edition. National Book Store, 1977.

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