Braccio, Michael
Reston Publishing Company, Inc., 1978
Buku Teks
Smith, Arthur Whitmore
McGraw-Hill, 1959
Buku Teks
Kantrowitz, Philip
Prentice-Hall, 1979
Buku Teks
Gregory, B. A., author
ELBS, 1977
Buku Teks
Bartholomen, Davis
Allyn and Bacon, 1966
Buku Teks