Keilegom, Ingrid Van, editor
Springer, 2011
eBooks
Alexander Moreira-Almeida, Franklin Santana Santos, editors
Springer, 2012
eBooks
edited by Charles J. O'conner
World Scientific, 1993
Buku Teks
Zikmund, William G., author
South-Western, Cengage Learning, 2010
Buku Teks
Gordon, Sheldon P., author
McGraw-Hill, 1994
Buku Teks