APA (7th ed.) Citation

Sowerby, J. E., & Johnson, C. (1861). The grasses of Great Britain. Robert Hardwicke.

Chicago Style (17th ed.) Citation

Sowerby, John Edward, and Charles Johnson. The Grasses of Great Britain. London: Robert Hardwicke, 1861.

MLA (9th ed.) Citation

Sowerby, John Edward, and Charles Johnson. The Grasses of Great Britain. Robert Hardwicke, 1861.