Gaya APA
Siahaan, M, M.
(2010).
Two Worlds To Be Rich
.
978-979-074-238-3:
Pt. Bhuana ilmu populer.
Gaya MLA
Siahaan, Margaretha, M..
"Two Worlds To Be Rich".
978-979-074-238-3:
Pt. Bhuana ilmu populer,
2010.
Text.