Dyfyniad APA

Estefan, G., & Ryan, J. (2012). Soil and plant analysis laboratory manual (2.). Scientific.

Dyfyniad Arddull Chicago

Estefan, George, and Jobhn Ryan. Soil and Plant Analysis Laboratory Manual. 2. India: Scientific, 2012.

Dyfyniad MLA

Estefan, George, and Jobhn Ryan. Soil and Plant Analysis Laboratory Manual. 2. Scientific, 2012.

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