David Ward, Kathleen Scaler Scott, editor
Psychology Press, 2011
Buku Teks
John Sikula, senior editor ; Thomas Buttery, editor, Edith Guyton, editor
Macmillan Library Reference USA, 1996
Buku Referensi
John C. Smart
Springer, 2012
eBooks
Kimberly A.Schonert-Reichl, Robert W. Roeser, editor
Springer, 2016
Buku Teks
edited by John C. Smart
Springer, 2011
Buku Teks