Czinkota, Michael R., author
The Dryden Press, 1994
Buku Teks
Czinkota, Michael R., author
The Dryden Press, 1992
Buku Teks
Wild, John J., author
Pearson, 2016
Buku Teks
Root, Franklin R., author
South-Western Publishing, 1978
Buku Teks
Daniels, John D.
Addison-Wesley , 1986
Buku Teks