by Thomas P. Edmonds ... [and others]
McGraw-Hill, 2000
Buku Teks SO
Hilman, A. Douglas
Dryden Press , 1986
Buku Teks
South-Western , 2005
Buku Teks
Pyle, William W.
Richard D. Irwin, 1980
Buku Teks
Kochanek, Richard F.
Harcourt Brace Jovanovich, 1990
Buku Teks