Washington, D.C.: U.S. Army. 2004 [2018-12-06]. (原始内容 (PDF)存档于2016-06-07). Lavender, Page. Donald Trump Reacts To Death Of George H.W. Bush. Huffington
(原始内容存档于2020-01-28). Sully H.W. Bush. vetdogs.org. [2020-01-27]. (原始内容存档于2019-11-04). America’s VetDogs Provides President George H.W. Bush With Service Dog