a. (1998). World Resousces 1998 - 1999. New York: Oxford university press.
Trích dẫn kiểu Chicagoa. World Resousces 1998 - 1999. New York: Oxford university press, 1998.
Deismireacht MLAa. World Resousces 1998 - 1999. New York: Oxford university press, 1998.
Rabhadh: D'fhéadfadh nach mbeadh na deismireachtaí seo 100% cruinn i gcónaí.