Ruff, F.
Elsevier, 1994
Buku Teks
Bansal, Raj K.
Tata McGraw-Hill, 1978
Buku Teks
Hatch, Lewis F.
McGraw-Hill Book Company, Inc., 1955
Buku Teks
McMurry, John, author
Brooks/Cole, 2007
Buku Teks
Beyer, Hans, author
[Publisher not identified], [Date of publication not identified]
Buku Teks