APA استشهاد

Johnson, A. G., & Triger, D. R. (1987). Liver disease and Gallstones: The facts.

استشهاد بنمط شيكاغو

Johnson, Alan G., و David R. Triger. Liver Disease and Gallstones: The Facts. Oxford, OUP, 1987.

MLA استشهاد

Johnson, Alan G., و David R. Triger. Liver Disease and Gallstones: The Facts. 1987.