Παραπομπή APA

Ashman, M. R., & Puri, G. (2002). Essential soil science: A clear and concise introduction to soil science. Oxford: Blackwell.

Παραπομπή Chicago Style

Ashman, Mark R., and G. Puri. Essential Soil Science: A Clear and Concise Introduction to Soil Science. Oxford: Blackwell, 2002.

Παραπομπή MLA

Ashman, Mark R., and G. Puri. Essential Soil Science: A Clear and Concise Introduction to Soil Science. Oxford: Blackwell, 2002.

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