APA引文

(2014). National Geographic September s/d Desember th. 2014 (Bendel). Gramedia.

Chicago Style (17th ed.) Citation

National Geographic September S/d Desember Th. 2014 (Bendel). Gramedia, 2014.

MLA引文

National Geographic September S/d Desember Th. 2014 (Bendel). Gramedia, 2014.

警告：這些引文格式不一定是100％准確.