APA Style
National Geographic: Twins Alike But Not Alike. (2012).
USA:
National Geographic Society.
Chicago Style
National Geographic: Twins Alike But Not Alike.
.
USA:
National Geographic Society,
2012.
Text.
MLA Style
National Geographic: Twins Alike But Not Alike.
.
USA:
National Geographic Society,
2012.
Text.
Turabian Style
National Geographic: Twins Alike But Not Alike.
USA:
National Geographic Society,
2012.
Print.