APA (7th ed.) Citation

Hubbard, C. E. (1968). Grasses: a guide to their structure: Identification, uses, and distribution in the British Isles (Revised edition.). Penguin.

Chicago Style (17th ed.) Citation

Hubbard, C. E. Grasses: A Guide to Their Structure: Identification, Uses, and Distribution in the British Isles. Revised edition. Harmondsworth: Penguin, 1968.

MLA (9th ed.) Citation

Hubbard, C. E. Grasses: A Guide to Their Structure: Identification, Uses, and Distribution in the British Isles. Revised edition. Penguin, 1968.