APA引文

(2015). National geographic September s/d Desember 2015. Kompas Gramedia.

Chicago Style (17th ed.) Citation

National Geographic September S/d Desember 2015. Kompas Gramedia, 2015.

MLA引文

National Geographic September S/d Desember 2015. Kompas Gramedia, 2015.

警告：這些引文格式不一定是100％准確.