Gaya APA
APPLEYARD, D, &, A, F.
(0).
International economics
(
4th. ed.)
.
Singapore:
McGraw-Hill Inc.
Gaya MLA
APPLEYARD, D.R., &, A.J., Field.
"International economics".
4th. ed.
Singapore:
McGraw-Hill Inc,
0.
Buku.