MLA

Mamula, Petar; Markowitz, Jonathan E; Baldassano, Robert N, et al. Pediatric Inflammatory Bowel Disease. Springer US, 2008.

APA

Mamula, R. N, Baldassano, R. N, Mamula, P., & Markowitz, J. E. (2008). Pediatric Inflammatory Bowel Disease. Springer US.

Chicago

Mamula, Petar; Markowitz, Jonathan E; Baldassano, Robert N, Robert N Baldassano, Petar Mamula, and Jonathan E Markowitz. Pediatric Inflammatory Bowel Disease. : Springer US, 2008.