Cita APA (7th ed.)

Schuller, R. (1985). The be happy attitudes: Eight postive attitudes that can transform your life. Word books.

Cita Chicago (17th ed.)

Schuller, Robert. The Be Happy Attitudes: Eight Postive Attitudes That Can Transform Your Life. Texas: Word books, 1985.

Cita MLA (9th ed.)

Schuller, Robert. The Be Happy Attitudes: Eight Postive Attitudes That Can Transform Your Life. Word books, 1985.