APA (7th ed.) Citation

(1993). World directory of map collections (3rd ed.). K. G. Saur.

Chicago Style (17th ed.) Citation

World Directory of Map Collections. 3rd ed. Munchen: K. G. Saur, 1993.

MLA (9th ed.) Citation

World Directory of Map Collections. 3rd ed. K. G. Saur, 1993.