Lawrence, John A
John Wiley & Sons, 2002
Buku Teks
Thomas N. Ingram...[et al.]
Harcourt College Publishers, 2001
Buku Teks
edited by Randy Y. Hirokawa and Marshall Scott Poole
Sage, 1986
Buku Teks
Howard, John A., author
Richard D. Irwin, 1962
Buku Teks
Dixon, John R.
McGraw-Hill, 1966
Buku Teks