Purba, P. J. (2005). Pengelolaan lingkungan sosial. Yayasan Obor Indonesia.
Chicago Style (17th ed.) CitationPurba, Penyunting: Johny. Pengelolaan Lingkungan Sosial. Yayasan Obor Indonesia, 2005.
MLA (8th ed.) CitationPurba, Penyunting: Johny. Pengelolaan Lingkungan Sosial. Yayasan Obor Indonesia, 2005.
Warning: These citations may not always be 100% accurate.