Longkutoy, John J., author
Mutiara Sumber Widya, 1985
Buku Teks
Longkutoy, John J., author
Mutiara, 1980
Buku Teks
Morgan, Carroll, 1952-, author
Prentice-Hall, 1994
Buku Teks
Donovan, John J., author
McGraw-Hill, 1972
Buku Teks
Maynard, Jeff, author
Butterworth, 1972
Buku Teks