FAO. (1999). FAO fertilizer yearbook; N.48/1998. Rome: FAO.
Trích dẫn kiểu ChicagoFAO. FAO Fertilizer Yearbook; N.48/1998. Rome: FAO, 1999.
MLA引文FAO. FAO Fertilizer Yearbook; N.48/1998. Rome: FAO, 1999.
警告：這些引文格式不一定是100％准確.
APA引文