United States department of agriculture; Economic reserch service, Shoemaker, R., Harwood, J., & Day-Rubenstein, K. (2001). Economic issues in agricultural biotechnology: Agriculture information bulletin number 762.
Παραπομπή σε μορφή Chicago (17η εκδ.)United States department of agriculture; Economic reserch service, Robbin Shoemaker, Joy Harwood, και Kelly Day-Rubenstein. Economic Issues in Agricultural Biotechnology: Agriculture Information Bulletin Number 762. 2001.
Παραπομπή σε μορφή MLA (9th εκδ.)United States department of agriculture; Economic reserch service, et al. Economic Issues in Agricultural Biotechnology: Agriculture Information Bulletin Number 762. 2001.