Burns, R. (2000). Introduction to research methods (4th ed.). Frenchs Forest: Pearson Education.
Trích dẫn kiểu ChicagoBurns, Robert. Introduction to Research Methods. 4th ed. Frenchs Forest: Pearson Education, 2000.
Deismireacht MLABurns, Robert. Introduction to Research Methods. 4th ed. Frenchs Forest: Pearson Education, 2000.
Rabhadh: D'fhéadfadh nach mbeadh na deismireachtaí seo 100% cruinn i gcónaí.