Ginsburg, Ph.D., J.N. (2005-08-22). "Control of Gastrointestinal Function". In Thomas M. Nosek, Ph.D. (ed.). Gastrointestinal Physiology. Essentials of Human Physiology. Augusta, Georgia, United State: Medical College of Georgia. pp. p. 30. Archived from the original on 2008-04-01. Retrieved 2007-06-29. {{cite book}}: Unknown parameter |chapterurl= ignored (help)
Ginsburg, Ph.D., J.N. (2005-08-22). "Control of Gastrointestinal Function". In Thomas M. Nosek, Ph.D. (ed.). Gastrointestinal Physiology. Essentials of Human Physiology. Augusta, Georgia, United State: Medical College of Georgia. pp. p. 30. Archived from the original on 2008-04-01. Retrieved 2007-06-29. {{cite book}}: Unknown parameter |chapterurl= ignored (help)