Παραπομπή APA

(1974). World guide to lilbraries (4th ed.). R R Bowker.

Παραπομπή Chicago Style

World Guide to Lilbraries. 4th ed. New York: R R Bowker, 1974.

Παραπομπή MLA

World Guide to Lilbraries. 4th ed. R R Bowker, 1974.