APA (7th ed.) Citation

Powell & Piper. (1995). Fundamentals of gastro enterology with self-assessment workbook (6th ed.). McGraw-Hill Book.

Chicago Style (17th ed.) Citation

Powell and Piper. Fundamentals of Gastro Enterology with Self-assessment Workbook. 6th ed. New York: McGraw-Hill Book, 1995.

MLA (8th ed.) Citation

Powell and Piper. Fundamentals of Gastro Enterology with Self-assessment Workbook. 6th ed. McGraw-Hill Book, 1995.