MLA

Erkan, Doruk, and Silvia S Pierangeli. Antiphospholipid Syndrome. Springer US, 2012.

APA

Erkan, D., & Pierangeli, S. S. (2012). Antiphospholipid Syndrome. Springer US.

Chicago

Erkan, Doruk, and Silvia S Pierangeli. Antiphospholipid Syndrome. : Springer US, 2012.