Gaya APA
Yusuf, G, D. (1999).
Economic analysis of sustainable development of the Indonesian coastal resources .
Ann Arbor, MI:
UMI.
Gaya MLA
Yusuf, Gellwynn, D.H..
"Economic analysis of sustainable development of the Indonesian coastal resources".
Ann Arbor, MI:
UMI,
1999.
Buku.