Johnson, E. D. (1960). Communication: An introduction to the history of the alphabet, writing, printing, books and libraries (2nd ed.). Scarecrow Press.
Chicago-referens (17:e uppl.)Johnson, Elmer Douglas. Communication: An Introduction to the History of the Alphabet, Writing, Printing, Books and Libraries. 2nd ed. New York: Scarecrow Press, 1960.
MLA-referens (9:e uppl.)Johnson, Elmer Douglas. Communication: An Introduction to the History of the Alphabet, Writing, Printing, Books and Libraries. 2nd ed. Scarecrow Press, 1960.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.