Feldman, M., Friedman, L. S., & Sleisenger, M. H. (2002). Sleisenger & Fordtran's Gastrointestinal and liver disease (7th edition.). Saunders.
Lua i Stíl Chicago (17ú heag.)Feldman, Mark, Lawrence S. Friedman, agus Marvin H. Sleisenger. Sleisenger & Fordtran's Gastrointestinal and Liver Disease. 7th edition. Philadelphia [u.a.]: Saunders, 2002.
Lua MLA (8ú heag.)Feldman, Mark, et al. Sleisenger & Fordtran's Gastrointestinal and Liver Disease. 7th edition. Saunders, 2002.
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