Gaya APA

GEOGRAPHIC, N., JOHNS, C. (2009). NATIONAL GEOGRAPHIC: GOLD, THE TRUE COST OF A GLOBAL OBSESSION (;;). ;WASHINGTON ;: ;National Geographic;.

Gaya MLA

GEOGRAPHIC, NATIONAL., JOHNS, CHRIS. "NATIONAL GEOGRAPHIC: GOLD, THE TRUE COST OF A GLOBAL OBSESSION". ;; ;WASHINGTON ;: ;National Geographic;, 2009. ;Text;.