APA (7th ed.) Citation

Smith, D. C., & Head, J. J. (1973). The lichen symbiosis. Oxford University Press.

Chicago Style (17th ed.) Citation

Smith, D. C., and J. J. Head. The Lichen Symbiosis. London: Oxford University Press, 1973.

MLA (8th ed.) Citation

Smith, D. C., and J. J. Head. The Lichen Symbiosis. Oxford University Press, 1973.