Gaya APA

Zollinger, R, M, J., Ellison, E, C. (2011). Zollinger's atlas of surgical operations (9th ed.). New York: McGraw-Hill.

Gaya MLA

Zollinger, Robert, Milton,, Jr.., Ellison, E., Christopher. "Zollinger's atlas of surgical operations". 9th ed. New York: McGraw-Hill, 2011. Text.