APA (7th ed.) Citation

Backer, C. A. (1888). The Problem of Krakatao as Seen by a Botanist. Springer Netherlands.

Chicago Style (17th ed.) Citation

Backer, C. A. The Problem of Krakatao as Seen by a Botanist. Dordrecht: Springer Netherlands, 1888.

MLA (9th ed.) Citation

Backer, C. A. The Problem of Krakatao as Seen by a Botanist. Springer Netherlands, 1888.