Tiffin, Joseph
Prentice-Hall, 1958
Buku Teks
edited by P.J.D. Drenth ... [and others]
Wiley, 1984
Buku Teks
Siegel, Laurence
Richard D. Irwin, 1968
Buku Teks SO
edited by Pieter J.D. Drenth, Henk Thierry, Charles J. de Wolff
Routledge, 1998
Buku Referensi
edited by Pieter J.D. Drenth, Henk Thierry, Charles J. de Wolff
Psychology Press, 1998
Buku Referensi