APA (7th ed.) Citation

Ascherson, P., & Graebner, P. (1907). Potamogetonaceae. Wilhelm Engelmann.

Chicago Style (17th ed.) Citation

Ascherson, P., and P. Graebner. Potamogetonaceae. Leipzig: Wilhelm Engelmann, 1907.

MLA (8th ed.) Citation

Ascherson, P., and P. Graebner. Potamogetonaceae. Wilhelm Engelmann, 1907.

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