Charlene Davis
Entrepreneur Press, 2012
Buku Teks
Seidman, Arthur H., author
Van Nostrand Reinhold, 1984
Buku Referensi
Wasito S., author
Karya Utama, 1981
Buku Teks
Coats, Robert R., author
Reston Publishing, 1982
Buku Teks
Rader, Robert J., author
PBI, 1978
Buku Teks