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.
Richard D. Irwin, 1962
Buku Teks
Dixon, John R.
McGraw-Hill, 1966
Buku Teks
Bunn, Derek W.
McGraw-Hill, 1984
Buku Teks