Citazione Stile APA (7a Edizione)

Lengenfelder, H. (1983). World guide to libraries: [ed. by / hrsg. von Helga Lengenfelder] (6th ed.). Saur.

Citazione stile Chigago Style (17a edizione)

Lengenfelder, Helga. World Guide to Libraries: [ed. by / Hrsg. Von Helga Lengenfelder]. 6th ed. München [u.a.]: Saur, 1983.

Citatione MLA (8a ed.)

Lengenfelder, Helga. World Guide to Libraries: [ed. by / Hrsg. Von Helga Lengenfelder]. 6th ed. Saur, 1983.