Timberlake, Karen C.
Pearson Benjamin Cummings, 2007
Buku Teks
Beyer, Hans
[Publisher not identified], [Date of publication not identified]
Buku Teks
Solomons, T.W. Graham
John Wiley & Sons, 1992
Buku Teks
Fessenden, Ralph J.
Wadsworth, 1979
Buku Teks
Shirley, David A.
Holt Rinehart & Winston, 1964
Buku Teks