Gaya APA

Santos, B, F., Soper, N. (2018). Choledocholithiasis (1st ed. 2018). New york: Springer International Publishing.

Gaya MLA

Santos, B., Fernando., Soper, Nathaniel. "Choledocholithiasis". 1st ed. 2018 New york: Springer International Publishing, 2018. Text.