David Crystal (2009). “List of cartoons ;The Hype About Texting ;How Weird is Texting? ;What is Distinctive About it? ;Why do They do it? ;Who Texts? ;What do They Text About? ;How do Other Languages do it? ;Why all the Fuss? ;Glossary ;Appendix ;Index”, p.158, Oxford University Press
Sir William Osler, Osler Library (1969). “Bibliotheca Osleriana: A Catalogue of Books Illustrating the History of Medicine and Science”, p.10, McGill-Queen's Press - MQUP
Booker T. Washington (1904*). “Address of Booker T. Washington, Principal of the Tuskegee Normal & Industrial Institute: Before the National Educational Association, St. Louis, Missouri, June 30, 1904”