Souvenir of Their Visit to America

MIT. Report of The Committee on Educational Survey (PDF) (报告). 1949 [2015-09-18]. （原始内容 (PDF)存档于2015-06-19）.  Souvenir Program, Dedication of Cambridge

of America. [2019-07-25]. （原始内容存档于2019-07-25）.  引用错误：没有为名为Tollie的参考文献提供内容 Spizer, Bruce. The Beatles Are Coming! The Birth of Beatlemania in America.