Gaya APA
Quinn, Robert. (2011).
Earth Then and Now .
New York:
Oxford University Press.
Gaya Chicago
Quinn, Robert.
Earth Then and Now.
New York:
Oxford University Press,
2011.
Text.
Gaya MLA
Quinn, Robert.
Earth Then and Now.
New York:
Oxford University Press,
2011.
Text.
Gaya Turabian
Quinn, Robert.
Earth Then and Now.
New York:
Oxford University Press,
2011.
Print.