Gaya APA
Appleyard, D, R. et al
(2010).
International economics
(
Seventh edition)
.
Atheneum, New York:
Mc Graw Hill.
Gaya MLA
Appleyard, Dennis, R.. et al.
"International economics".
Seventh edition
Atheneum, New York:
Mc Graw Hill,
2010.
.