Cita APA

SpringerLink (Online service), Porro, G. B., & Maconi, G. (2007). Ultrasound of the gastrointestinal tract. Springer-Verlag Berlin Heidelberg.

Citación estilo Chicago

SpringerLink (Online service), Gabriele Bianchi Porro, and Giovanni Maconi. Ultrasound of the Gastrointestinal Tract. Berlin, Heidelberg: Springer-Verlag Berlin Heidelberg, 2007.

Cita MLA

SpringerLink (Online service), et al. Ultrasound of the Gastrointestinal Tract. Springer-Verlag Berlin Heidelberg, 2007.

Warning: These citations may not always be 100% accurate.