Citazione Stile APA (7a Edizione)

(1923). American library directory ... a classified list of libraries with names of librarians. R. R. Bowker.

Citazione stile Chigago Style (17a edizione)

American Library Directory ... a Classified List of Libraries with Names of Librarians. New York: R. R. Bowker, 1923.

Citatione MLA (9a ed.)

American Library Directory ... a Classified List of Libraries with Names of Librarians. R. R. Bowker, 1923.