Lyon, Fergus ; Mollering, Guido ; Saunders, Mark N. K.: Handbook of Research Methods on Trust, 2011
Neuman, W.L.: Social Research Methods: Qualitative and Quantitative Approaches. 7 : Alpha Books, 2010
Creswell, J. W.: Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. 3 : Sage Publications Ltd., 2008
Dooley, D.: Social Research Methods. 4 : Prentice Hall India, 2000
Klein, K. J. (Bearb.) ; Kozlowski, S. W. J. (Bearb.): Multilevel Theory, Research, and Methods in Organizations: Foundations, Extensions, and New Directions. 3 : Jossey Bass, 2000