edited by David M. Messick and Roderick M. Kramer
Lawrence Erlbaum Associates , 2005
Buku Teks
Paul M. Camic, Jean E. Rhodes, Lucy Yardley
APA, 2007
Buku Teks
Lewis, Michele K., author
[Springer, ], 2012
eBooks
edited by Pieter J.D. Drenth, Joseph A. Sergeant, Roelf J. Takens
John Wiley & Sons, 1990
Buku Teks
Alloy, Lauren B., author
McGraw-Hill , 1999
Buku Teks