Gaya APA

R, B, R. (1962). American library directory : a classified of libraries, with names of librarians and statistical data, compiled biennially (Edisi 23). New York: R.R Bowker Company.

Gaya MLA

R, Bowker., R.. "American library directory : a classified of libraries, with names of librarians and statistical data, compiled biennially". Edisi 23 New York: R.R Bowker Company, 1962. Text.