Wils, F., & Helmsing, A. H. J. (2001). Enabling communities and markets: Meanings, relationships and options in settlement improvement. ORPAS - Institute of Social Studies.
芝加哥风格引文Wils, Frits, 与 A. H. J. Helmsing. Enabling Communities and Markets: Meanings, Relationships and Options in Settlement Improvement. The Hague: ORPAS - Institute of Social Studies, 2001.
MLA引文Wils, Frits, 与 A. H. J. Helmsing. Enabling Communities and Markets: Meanings, Relationships and Options in Settlement Improvement. ORPAS - Institute of Social Studies, 2001.
警告：这些引文格式不一定是100％准确.