APA Style
Ashford, David. (2013).
Space Exploration .
America Serikat:
Hodder & Stoughton.
Chicago Style
Ashford, David.
Space Exploration.
America Serikat:
Hodder & Stoughton,
2013.
Text.
MLA Style
Ashford, David.
Space Exploration.
America Serikat:
Hodder & Stoughton,
2013.
Text.
Turabian Style
Ashford, David.
Space Exploration.
America Serikat:
Hodder & Stoughton,
2013.
Print.