Alexander Moreira-Almeida, Franklin Santana Santos, editors
Springer, 2012
eBooks
edited by Charles J. O'conner
World Scientific, 1993
Buku Teks
Zikmund, William G.
South-Western, Cengage Learning, 2010
Buku Teks
Gordon, Sheldon P.
McGraw-Hill, 1994
Buku Teks
American Management Association
American Management Assosiation, 1958
Buku Teks