edited by Charles A. Harper
McGraw-Hill, 1972
Buku Referensi
Matt, Stephen R.
Goodheart-Willcox, 1994
Buku Teks
Singer, Bertrand B.
McGraw-Hill, 1978
Buku Teks SO
Miller, Gary M.
Prentice-Hall, 1981
Buku Teks
Patrick, Dale R.
Prenticel Hall Carreer & Technology, 1990
Buku Teks