APA (7th ed.) Citation

Wolter, J. A., Grim, R. E., & Carrington, D. K. (1986). World directory of map collections (2nd ed.). Saur.

Chicago Style (17th ed.) Citation

Wolter, John A., Ronald E. Grim, and David K. Carrington. World Directory of Map Collections. 2nd ed. München [etc.]: Saur, 1986.

MLA (9th ed.) Citation

Wolter, John A., et al. World Directory of Map Collections. 2nd ed. Saur, 1986.