(2012). National Geographic Mei-Agustus 2012. Gramedia.
Chicago Style (17th ed.) CitationNational Geographic Mei-Agustus 2012. Gramedia, 2012.
MLA引文National Geographic Mei-Agustus 2012. Gramedia, 2012.
警告：這些引文格式不一定是100％准確.
APA引文