APA (7th ed.) Citation

Hackel, E., & Pax, F. (1887). Gramineae. Wilhelm Engelmann.

Chicago Style (17th ed.) Citation

Hackel, E., and Ferdinand Pax. Gramineae. Leipzig: Wilhelm Engelmann, 1887.

MLA (9th ed.) Citation

Hackel, E., and Ferdinand Pax. Gramineae. Wilhelm Engelmann, 1887.

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