Creswell, J. W. Educational research: Planning, conducting, and evaluating quantitative and qualitative.
Цитирование в стиле Чикаго (17-е изд.)Creswell, J. W. Educational Research: Planning, Conducting, and Evaluating Quantitative and Qualitative.
Цитирование MLA (8-е изд.)Creswell, J. W. Educational Research: Planning, Conducting, and Evaluating Quantitative and Qualitative.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.