Cita APA (7th ed.)

Keller,J. (2017). Attitude is everything (1st.). HarperCollins publishers.

Cita Chicago (17th ed.)

Keller,J. Attitude Is Everything. 1st. Noida: HarperCollins publishers, 2017.

Cita MLA (9th ed.)

Keller,J. Attitude Is Everything. 1st. HarperCollins publishers, 2017.

Atenció: Aquestes cites poden no estar 100% correctes.