Waksman, S. A. (1938). Humus: Origin, chemical composition, and importance in nature (2a. ed.). Williams and Wilkins.
Chicagoスタイル(17版)引用形式Waksman, Selman A. Humus: Origin, Chemical Composition, and Importance in Nature. 2a. ed. Baltimore: Williams and Wilkins, 1938.
MLA(9版)引用形式Waksman, Selman A. Humus: Origin, Chemical Composition, and Importance in Nature. 2a. ed. Williams and Wilkins, 1938.
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