Coffey, Robert E., author
Prentice-Hall, 1975
Buku Teks
Ashford, Jose B., author
Wadsworth, 2001
Buku Teks
Ashford, Jose B., author
Cengage Learning, 2018
Buku Teks
Berelson, Bernard, author
Harcourt Brece & World, 1964
Buku Teks
McLaughlin, Barry
The Free Press, 1971
Buku Teks