APA Style
Rubin, Gretchen. (2015).
The Happiness Project .
New York:
HarperCollins Publisher.
Chicago Style
Rubin, Gretchen.
The Happiness Project.
New York:
HarperCollins Publisher,
2015.
Text.
MLA Style
Rubin, Gretchen.
The Happiness Project.
New York:
HarperCollins Publisher,
2015.
Text.
Turabian Style
Rubin, Gretchen.
The Happiness Project.
New York:
HarperCollins Publisher,
2015.
Print.