^Robert Herrick; Lindsay Todd Damon. Composition and Rhetoric for Schools. Original from Harvard University: Scott, Foresman and Co. 1902: 382.引文使用过时参数coauthors (帮助)
^Jefferson Butler Fletcher; George Rice Carpenter. Introduction to Theme-writing. Original from Harvard University: Allyn & Bacon. 1893: 84.引文使用过时参数coauthors (帮助)