APA Style
Petrokis, Lee. (2013).
Three Pigs .
USA:
National Geographic.
Chicago Style
Petrokis, Lee.
Three Pigs.
USA:
National Geographic,
2013.
Text.
MLA Style
Petrokis, Lee.
Three Pigs.
USA:
National Geographic,
2013.
Text.
Turabian Style
Petrokis, Lee.
Three Pigs.
USA:
National Geographic,
2013.
Print.