Ekonomi, U. P. (2011). Water supply projects, 1991-95. Jabatan Percetakan Negara.
Chicago Style CitationEkonomi, Unit Perancang. Water Supply Projects, 1991-95. Jabatan Percetakan Negara, 2011.
MLA引文Ekonomi, Unit Perancang. Water Supply Projects, 1991-95. Jabatan Percetakan Negara, 2011.
警告:這些引文格式不一定是100%准確.