Norton, Arthur P., author
Longman, 1986
Buku Referensi
Buchsbaum, Walter H., author
Prentice-Hall, 1978
Buku Referensi
Buchsbaum, Walter H., author
Prentice-Hall, 1978
Buku Referensi
Kluwer Academic Publishers, 1976
Buku Teks
London Pitman Pub. 1992,
Buku Teks