APA (7th ed.) Citation

Porter, T. C., & Coulter, J. M. (1874). Synopsis of the flora of Colorado. Gov. Print. Off.

Chicago Style (17th ed.) Citation

Porter, Thomas Conrad, and John Merle Coulter. Synopsis of the Flora of Colorado. Washington: Gov. Print. Off, 1874.

MLA (9th ed.) Citation

Porter, Thomas Conrad, and John Merle Coulter. Synopsis of the Flora of Colorado. Gov. Print. Off, 1874.