Zbar, Paul B., author
MrGraw-Hill, 1977
Buku Teks
Zbar, Paul B., author
McGraw-Hill Book, 1993
Buku Teks
John Wiley & Sons, 1951
Buku Teks
Matt, Stephen R., author
Goodheart-Willcox, 1994
Buku Teks
Patrick, Dale R., author
Prenticel Hall Carreer & Technology, 1990
Buku Teks