Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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