Style de citation APA

Leonard, W. H., & Martin, J. H. (1967). Principles of field crop production (2.). Mac Millan Company.

Style de citation Chicago

Leonard, Warren H., et John H. Martin. Principles of Field Crop Production. 2. Newyork: Mac Millan Company, 1967.

Style de citation MLA

Leonard, Warren H., et John H. Martin. Principles of Field Crop Production. 2. Mac Millan Company, 1967.