APA Style
Rubin, Gretchen. (2018).
The Happiness Project .
USA:
Harper Collins College.
Chicago Style
Rubin, Gretchen.
The Happiness Project.
USA:
Harper Collins College,
2018.
Book.
MLA Style
Rubin, Gretchen.
The Happiness Project.
USA:
Harper Collins College,
2018.
Book.
Turabian Style
Rubin, Gretchen.
The Happiness Project.
USA:
Harper Collins College,
2018.
Book.