APA Citatie

Ryan, J., & Estefan, G. R. (2007). Soil and plant analysis laboratory manual (2nd. ed.). Scientific Publishers.

Chicago Style citaat

Ryan, John, en George Rashid Estefan. Soil and Plant Analysis Laboratory Manual. 2nd. ed. Jodhpur: Scientific Publishers, 2007.

MLA citatie

Ryan, John, en George Rashid Estefan. Soil and Plant Analysis Laboratory Manual. 2nd. ed. Scientific Publishers, 2007.