APA (7th ed.) Citation

Backer, C. A. The problem of Krakatao as seen by a botanist: By C. A. Backer. Published by the author.

Chicago Style (17th ed.) Citation

Backer, C. A. The Problem of Krakatao as Seen by a Botanist: By C. A. Backer. Published by the Author.

MLA (9th ed.) Citation

Backer, C. A. The Problem of Krakatao as Seen by a Botanist: By C. A. Backer. Published by the Author.

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