See Allo

edited by Harry W. Karn and B. von Haller Gilmer

McGraw-Hill, 1962

Buku Teks

Blum, Milton L., author

Harper & Row , 1968

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

Jex, Steve M., author

John Wiley and Sons, 2002

Buku Teks

Furnham, Adrian, author

Psychology Press, 2002

Buku Teks