Hradesky, John L.
McGraw-Hill, 1995
Buku Referensi
Strategic Direction Publishers, [date of publication not identified]
Buku Referensi
Strategic Direction Publishers, [date of publication not identified]
Buku Referensi
Soin, Sarv Singh
McGraw-Hill, 1992
Buku Teks
Soin, Sarv Singh
McGraw-Hill, 1993
Buku Teks