APA (7th ed.) Citation

Knuth, R. (1912). Geraniaceae. Wilhelm Engelmann.

Chicago Style (17th ed.) Citation

Knuth, Reinhard. Geraniaceae. Leipzig: Wilhelm Engelmann, 1912.

MLA (8th ed.) Citation

Knuth, Reinhard. Geraniaceae. Wilhelm Engelmann, 1912.

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