Cita APA (7a ed.)

(1991). World guide to libraries (10th ed.). K. G. Saur.

Cita Chicago Style (17a ed.)

World Guide to Libraries. 10th ed. München [etc.]: K. G. Saur, 1991.

Cita MLA (9a ed.)

World Guide to Libraries. 10th ed. K. G. Saur, 1991.