APA (7th ed.) Citation

Janson, M., & Opitz, H. (2014). World guide to libraries 2014 (28th ed.). de Gruyter.

Chicago Style (17th ed.) Citation

Janson, Marlies, and Helmut Opitz. World Guide to Libraries 2014. 28th ed. Berlin Boston: de Gruyter, 2014.

MLA (9th ed.) Citation

Janson, Marlies, and Helmut Opitz. World Guide to Libraries 2014. 28th ed. de Gruyter, 2014.

Warning: These citations may not always be 100% accurate.