APA Style

National Geographic: Sugar | Vol. 224 No.2 | Agustus 2013. (2013). USA: National Geographic Society.

MLA Style

National Geographic: Sugar | Vol. 224 No.2 | Agustus 2013. Vol. 224 No.2 | Agustus 2013. USA: National Geographic Society, 2013. Perpustakaan KALBIS.