Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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