Penggayaan APA
Porter, Keith. (1987).
Looking at Animals .
United State of America:
Discovering Science.
Chicago Style
Porter, Keith.
Looking at Animals.
United State of America:
Discovering Science,
1987.
Text.
MLA Style
Porter, Keith.
Looking at Animals.
United State of America:
Discovering Science,
1987.
Text.
Turabian Style
Porter, Keith.
Looking at Animals.
United State of America:
Discovering Science,
1987.
Print.