APA

Harrison's principles of internal medicine, . (2001). Harrison's principles of internal medicine. New York: McGraw-Hill.

Chicago

Harrison's principles of internal medicine, . 2001. Harrison's principles of internal medicine. New York: McGraw-Hill.

Harvard

Harrison's principles of internal medicine, . (2001). Harrison's principles of internal medicine. New York: McGraw-Hill.

MLA

Harrison's principles of internal medicine, . Harrison's principles of internal medicine. New York: McGraw-Hill. 2001.