APA (7th ed.) Citation

Hilger, H. H., & Zippel, E. (2001). Studies in the Boraginaceae: An index to the publications of Ivan M. Johnston dealing with the Borage family. Thüringische Botanische Ges.

Chicago Style (17th ed.) Citation

Hilger, Hartmut H., and Elke Zippel. Studies in the Boraginaceae: An Index to the Publications of Ivan M. Johnston Dealing with the Borage Family. Jena: Thüringische Botanische Ges, 2001.

MLA (9th ed.) Citation

Hilger, Hartmut H., and Elke Zippel. Studies in the Boraginaceae: An Index to the Publications of Ivan M. Johnston Dealing with the Borage Family. Thüringische Botanische Ges, 2001.