Davis, Sid, author
American Management Association, 2008
eBooks
Santini, Claudio, author
Images Publishing Group, 2009
Buku Referensi
Obi Chidi, author
University of Port Harcourt, Physical Chemistry Unit, Department of Pure and Industrial Chemistry, Faculty of Science., 2016
Artikel Jurnal
Tanaka, Kakuei, author
The Simul Press, 1973
Buku Teks
Gang Da Press, 2011
Buku Referensi