APA Style
National Geographic: Vol.183-184, No.1-6: January 1993-December 1993. ().
Washington, D.C.:
National Geographic Society.
Chicago Style
National Geographic: Vol.183-184, No.1-6: January 1993-December 1993.
.
Washington, D.C.:
National Geographic Society,
.
Text.
MLA Style
National Geographic: Vol.183-184, No.1-6: January 1993-December 1993.
.
Washington, D.C.:
National Geographic Society,
.
Text.
Turabian Style
National Geographic: Vol.183-184, No.1-6: January 1993-December 1993.
Washington, D.C.:
National Geographic Society,
.
Print.