Creswell, J. W. (2003). Research design: Qualitative, quantitative, and mixed methods approaches (2nd ed.). Sage.
Цитирование в стиле Чикаго (17-е изд.)Creswell, John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 2nd ed. Thousand Oaks, Calif: Sage, 2003.
Цитирование MLA (9-е изд.)Creswell, John W. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 2nd ed. Sage, 2003.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.