APA Style
FIRTH, Rachel. (2008).
Astronomy .
London:
Usborne.
Chicago Style
FIRTH, Rachel.
Astronomy.
London:
Usborne,
2008.
Text.
MLA Style
FIRTH, Rachel.
Astronomy.
London:
Usborne,
2008.
Text.
Turabian Style
FIRTH, Rachel.
Astronomy.
London:
Usborne,
2008.
Print.