(2015). National geographic September s/d Desember 2015. Kompas Gramedia.
Chicagoスタイル(17版)引用形式National Geographic September S/d Desember 2015. Kompas Gramedia, 2015.
MLA(8版)引用形式National Geographic September S/d Desember 2015. Kompas Gramedia, 2015.
警告: この引用は必ずしも正確ではありません.