APA (7th ed.) Citation

Janson, M., Ratt, S., & Schniederjürgen, A. (2018). World Guide to Libraries 2018 (33rd Edition.). de Gruyter Saur.

Chicago Style (17th ed.) Citation

Janson, Marlies, Sandro Ratt, and Alex Schniederjürgen. World Guide to Libraries 2018. 33rd Edition. Berlin Boston: de Gruyter Saur, 2018.

MLA (9th ed.) Citation

Janson, Marlies, et al. World Guide to Libraries 2018. 33rd Edition. de Gruyter Saur, 2018.