Cita APA (7a ed.)

Piper, P. J., & Krell, R. D. Advances in the understanding and treatment of asthma.

Cita Chicago Style (17a ed.)

Piper, Priscilla J., y Robert D. Krell. Advances in the Understanding and Treatment of Asthma.

Cita MLA (8a ed.)

Piper, Priscilla J., y Robert D. Krell. Advances in the Understanding and Treatment of Asthma.