Acquaah, G. (2005). Principles of crop production: Theory, techniques, and technology (2nd ed.). Pearson Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Acquaah, George. Principles of Crop Production: Theory, Techniques, and Technology. 2nd ed. Upper Saddle River, N.J.: Pearson Prentice Hall, 2005.
Lua MLA (9ú heag.)Acquaah, George. Principles of Crop Production: Theory, Techniques, and Technology. 2nd ed. Pearson Prentice Hall, 2005.
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