Trevithick, Pamela, author
McGraw-Hill , 2012
Buku Teks
Lawrence F. Wolper, editor
Jones & Bartlett Learning, 2013
Buku Teks
Anne Moen, Anders I. Morch, Sami Paavola, editor
[, Sense], 2012
eBooks
Steinberg, Esther R., author
Erlbaum Associates, 1991
Buku Teks
edited by Joanne Yates and John van Maanen
Sage, 2000
Buku Teks