APA Style

Hallinan, P.K.. (2005). Let's Be Happy . : .

Chicago Style

Hallinan, P.K.. Let's Be Happy. : , 2005. Book.

MLA Style

Hallinan, P.K.. Let's Be Happy. : , 2005. Book.

Turabian Style

Hallinan, P.K.. Let's Be Happy. : , 2005. Book.