APA Style
Petrokis, Lee. (2013).
Our World : The Three Pigs .
Usa:
National Geographic Learning.
Chicago Style
Petrokis, Lee.
Our World : The Three Pigs.
Usa:
National Geographic Learning,
2013.
Printed Book.
MLA Style
Petrokis, Lee.
Our World : The Three Pigs.
Usa:
National Geographic Learning,
2013.
Printed Book.
Turabian Style
Petrokis, Lee.
Our World : The Three Pigs.
Usa:
National Geographic Learning,
2013.
Printed Book.