Gaya APA
Sims, Lesley. (2001).
Planet .
london:
Grolier international.
Gaya Chicago
Sims, Lesley.
Planet.
london:
Grolier international,
2001.
Text.
Gaya MLA
Sims, Lesley.
Planet.
london:
Grolier international,
2001.
Text.
Gaya Turabian
Sims, Lesley.
Planet.
london:
Grolier international,
2001.
Print.