APA (7th ed.) Citation

Gardner, J. S., & Ettingshausen, C. (1879). A monograph of the British Eocene flora.

Chicago Style (17th ed.) Citation

Gardner, John Starkie, and Constantin Ettingshausen. A Monograph of the British Eocene Flora. 1879.

MLA (9th ed.) Citation

Gardner, John Starkie, and Constantin Ettingshausen. A Monograph of the British Eocene Flora. 1879.

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