(1997). Annual report 1997 (International Institute of Tropical Agriculture). Nigeria: IITA.
Čikaški stil citiranjaAnnual Report 1997 (International Institute of Tropical Agriculture). Nigeria: IITA, 1997.
MLA način citiranjaAnnual Report 1997 (International Institute of Tropical Agriculture). Nigeria: IITA, 1997.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.