A SAGE Publications book: Mixed Methods, Research Design, Research Methods , Research Methods, Research Design: Qualitative, Quantitative, and Mixed Methods Approaches: John W. Creswell.
C. Linehan, B. Kirman, S. Lawson, and G. Chan. Proceedings of the 2011 annual conference on Human factors in computing systems, page 1979--1988. New York, NY, USA, ACM, (2011)
L. Benton, H. Johnson, M. Brosnan, E. Ashwin, and B. Grawemeyer. Proceedings of the 2011 annual conference extended abstracts on Human factors in computing systems, page 1759--1764. New York, NY, USA, ACM, (2011)