Condon, Robert J., author
Reston Publishing, 1978
Buku Teks
Orilia, Lawrence, author
John Wiley & Sons, 1972
Buku Teks
Booth, Grayce M., author
John Wiley & Sons, 1973
Buku Teks
Cecelja, Franjo, author
Penton, 2002
Buku Teks
Gleim, George A., author
Prentice-Hall, 1971
Buku Teks