Gaya APA

Blackstone, M, O. (1984). Endoscopic Interpretation: Normal and Pathologic Appearances of the Gastrointestinal Tract . New York: Raven Press.

Gaya MLA

Blackstone, Michael, O. "Endoscopic Interpretation: Normal and Pathologic Appearances of the Gastrointestinal Tract". New York: Raven Press, 1984. print.