D Duncan, . M. (1984). The desing of ventilated improved pit latrines.
Chicagoスタイル(17版)引用形式D Duncan, Mara. The Desing of Ventilated Improved Pit Latrines. Washington, DC : Technology Advisory Group, World Bank, 1984.
MLA(9版)引用形式D Duncan, Mara. The Desing of Ventilated Improved Pit Latrines. 1984.
警告: この引用は必ずしも正確ではありません.