Official Gazette of the Republic of the Philippines. 1987-02-11 [2021-03-14]. (原始内容存档于2017-06-07). Brown, Jessica; Mitchell, Nora J.; Beresford, Michael
(页面存档备份,存于互联网档案馆) History of US Interventions, by Derek, Mitchell Impressions of Vietnam and descriptions of the daily life of a soldier from the oral history of Elliott