MLA

de Vries, Nico, Madeline Ravesloot, and J. Peter van Maanen. Positional Therapy In Obstructive Sleep Apnea. Springer International Publishing, 2015.

APA

de Vries, N., Ravesloot, M., & van Maanen, J. Peter. (2015). Positional Therapy in Obstructive Sleep Apnea. Springer International Publishing.

Chicago

de Vries, Nico, Madeline Ravesloot, and J. Peter van Maanen. Positional Therapy In Obstructive Sleep Apnea. : Springer International Publishing, 2015.