Eko Nugroho, author
Andi, 1990
Buku Teks
Farina, Mario V., author
Reston Publishing Company, 1973
Buku Teks
Worth, Thomas, author
Prentice-Hall of India 1981, 1977
Buku Teks
Downing, Douglas, author
Jakarta Erlangga 1990
Buku Referensi
Philippakis, Andreas S., author
McGraw-Hill, 1974
Buku Teks