Rplly Intan, Chi-Hung Chi, Henry N. Palit, Leo W. Santoso, editor
Springer, 2015
Buku Teks SO
Olivier C.L. Haas, Keith J. Burnham, editor
Taylor & Francis Group, 2008
Buku Teks SO
edited by Claude Frasson, Gilles Gauthier
Ablex, 1990
Buku Teks
Wigdor, Daniel
Elsevier , 2011
Buku Teks SO
Larson, James A.
Prentice-Hall, 1992
Buku Teks SO