APA Style
Oyen, L., Nguyen, X, D. (1999).
Plant Resources of South-East Asia 19 Essential Oil Plants .
Bogor:
Prosea Indonesia.
MLA Style
Oyen, L.P.A.., Nguyen, Xuan, Dung.
"Plant Resources of South-East Asia 19 Essential Oil Plants".
Bogor:
Prosea Indonesia,
1999.
Koleksi Buku Teks.