Mugenda, A. G. (2008). Social science research: Theory and principles. Applied Research & Training Services.
Chicago Style (17th ed.) ZitazioaMugenda, Abel Gitau. Social Science Research: Theory and Principles. Nairobi, Kenya: Applied Research & Training Services, 2008.
MLA (9th ed.) ZitazioaMugenda, Abel Gitau. Social Science Research: Theory and Principles. Applied Research & Training Services, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.