Latimer, Paul
CCH Australia Limited, 1996
Buku Teks
Miller, Roger LeRoy, author
West Educational Publishing, 1999
Buku Teks
Barnes, A. James, author
Homewood, Ill., Learning Systems
Buku Teks
Kerr, Thomas S., author
John Wiley & Sons, 1952
Buku Teks
Lowe, G.B., author
South-Western Publishing, 1983
Buku Teks