APA (7th ed.) Citation

Hubbard, C. E., & Hubbard, J. C. E. (1984). Grasses: A guide to their structure, identification, uses, and distribution in the British Isles (3rd ed.). Penguin.

Chicago Style (17th ed.) Citation

Hubbard, C. E., and J. C. E. Hubbard. Grasses: A Guide to Their Structure, Identification, Uses, and Distribution in the British Isles. 3rd ed. Harmondsworth: Penguin, 1984.

MLA (9th ed.) Citation

Hubbard, C. E., and J. C. E. Hubbard. Grasses: A Guide to Their Structure, Identification, Uses, and Distribution in the British Isles. 3rd ed. Penguin, 1984.