Gorden, Reymond L.
Dorsey Press, 1975
Buku Teks
Gorden, Reymond L.
Dorsey Press, 1980
Buku Teks
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
by Thomas A. Kindermann and Jaan Valsiner
New Jersey, 1995
Buku Teks