APA (7th ed.) Citation

Synge, P. M., & Thorton, R. J. (1939). Plants with personality. L. Drummond.

Chicago Style (17th ed.) Citation

Synge, Patrick M., and Robert John Thorton. Plants with Personality. London: L. Drummond, 1939.

MLA (9th ed.) Citation

Synge, Patrick M., and Robert John Thorton. Plants with Personality. L. Drummond, 1939.