Neckers, Douglas C.
John Wiley & Sons, 1977
Buku Teks
McMurry, John
Brooks/Cole, 2007
Buku Teks
Weeks, Daniel P.
Saunders College , 1998
Buku Teks
Roberts, John D.
W.A. Benjamin , 1977
Buku Teks
Beyer, Hans
[Publisher not identified], [Date of publication not identified]
Buku Teks