Gaya APA
ball, D, A, ., (., krista, .
(2005).
International business : buku 1 ed.9
.
Jakarta:
Salemba Empat.
Gaya MLA
ball, Donald, A,, ..., (at...all)., krista, .
"International business : buku 1 ed.9".
Jakarta:
Salemba Empat,
2005.
Text.