Artikel Jurnal
Wilson, E.M., author
Institut Teknologi Bandung, 1990
Buku Teks
Seyhan, Ersin, author
Gadjah Mada University Press , 1993
Buku Teks
Eagleson, Peter S., author
McGraw-Hill, 1970
Buku Teks
Mutreja, K.N., author
Tata McGraw-Hill, 1994
Buku Teks