Newstrom, John W.
Tata McGraw-Hill , 1997
Buku Teks SO
Longres, John F.
F.E. Peacock Publisher, Inc, 1990
Buku Teks
Wilson, Josephine F.
Tomson Wadsworth, 2003
Buku Teks
edited by James D. Loy and Calvin B. Peters
Oxford University Press, 1991
Buku Teks SO
Kluckhohn, Clyde
Fawcett, 1957
Buku Teks