Cita APA (7a ed.)

Ruch, W., Platt, T., Proyer, R. T., & Chen, H. (2019). Humor and Laughter, Playfulness and Cheerfulness: Upsides and Downsides to a Life of Lightness. Frontiers Media SA.

Cita Chicago Style (17a ed.)

Ruch, Willibald, Tracey Platt, René T. Proyer, y Hsueh-Chih Chen. Humor and Laughter, Playfulness and Cheerfulness: Upsides and Downsides to a Life of Lightness. Frontiers Media SA, 2019.

Cita MLA (9a ed.)

Ruch, Willibald, et al. Humor and Laughter, Playfulness and Cheerfulness: Upsides and Downsides to a Life of Lightness. Frontiers Media SA, 2019.