Trochim, W. M. K. (2001). Researchh methods knowledge base (2a. ed.). US: Atomicdogpublishing, Estados Unidos.
Chicago Style CitationTrochim, William M. K. Researchh Methods Knowledge Base. 2a. ed. US: Atomicdogpublishing, Estados Unidos, 2001.
MLA CitationTrochim, William M. K. Researchh Methods Knowledge Base. 2a. ed. US: Atomicdogpublishing, Estados Unidos, 2001.
Warning: These citations may not always be 100% accurate.