MLA

Ionescu, Clara Mihaela, and Ionescu. The Human Respiratory System. Springer London, 2013.

APA

Ionescu, C. Mihaela, & Ionescu, I. (2013). The Human Respiratory System. Springer London.

Chicago

Ionescu, Clara Mihaela, and Ionescu. The Human Respiratory System. : Springer London, 2013.