Gaya APA
Petersen, David. (2001).
Yellowstone National Park .
New York:
Childrens Press.
Gaya Chicago
Petersen, David.
Yellowstone National Park.
New York:
Childrens Press,
2001.
Text.
Gaya MLA
Petersen, David.
Yellowstone National Park.
New York:
Childrens Press,
2001.
Text.
Gaya Turabian
Petersen, David.
Yellowstone National Park.
New York:
Childrens Press,
2001.
Print.