(1999). National integrated research, development and extension agenda for vegetables, 1999-2004. s.n.
芝加哥风格引文National Integrated Research, Development and Extension Agenda for Vegetables, 1999-2004. [S.l: s.n, 1999.
MLA引文National Integrated Research, Development and Extension Agenda for Vegetables, 1999-2004. s.n, 1999.
警告：这些引文格式不一定是100％准确.