Park, K. S. (2015). Introduction to Starting Upper Gastrointestinal Endoscopy: Proper Insertion, Complete Observation, and Appropriate Photographing. Clinical endoscopy, 48(4), 279-284. https://doi.org/10.5946/ce.2015.48.4.279
Chicago Style (17th ed.) CitationPark, Kyung Sik. "Introduction to Starting Upper Gastrointestinal Endoscopy: Proper Insertion, Complete Observation, and Appropriate Photographing." Clinical Endoscopy 48, no. 4 (2015): 279-284. https://doi.org/10.5946/ce.2015.48.4.279.
MLA (9th ed.) CitationPark, Kyung Sik. "Introduction to Starting Upper Gastrointestinal Endoscopy: Proper Insertion, Complete Observation, and Appropriate Photographing." Clinical Endoscopy, vol. 48, no. 4, 2015, pp. 279-284, https://doi.org/10.5946/ce.2015.48.4.279.
Warning: These citations may not always be 100% accurate.