APA Style
Gerritsen, Tess. (1999).
Gravity (1999).
New York:
Pocket.
Chicago Style
Gerritsen, Tess.
Gravity.
1999
New York:
Pocket,
1999.
Text.
MLA Style
Gerritsen, Tess.
Gravity.
1999
New York:
Pocket,
1999.
Text.
Turabian Style
Gerritsen, Tess.
Gravity.
1999
New York:
Pocket,
1999.
Print.