APA Style
Gray, William R.. (1976).
Camping Adventure .
:
National Geographic Society.
Chicago Style
Gray, William R..
Camping Adventure.
:
National Geographic Society,
1976.
.
MLA Style
Gray, William R..
Camping Adventure.
:
National Geographic Society,
1976.
.
Turabian Style
Gray, William R..
Camping Adventure.
:
National Geographic Society,
1976.
.