APA (7th ed.) Citation

Nichols, D. J., & Johnson, K. R. (2008). Plants and the K-T boundary. Cambridge University Press.

Chicago Style (17th ed.) Citation

Nichols, Douglas J., and Kirk R. Johnson. Plants and the K-T Boundary. Cambridge: Cambridge University Press, 2008.

MLA (9th ed.) Citation

Nichols, Douglas J., and Kirk R. Johnson. Plants and the K-T Boundary. Cambridge University Press, 2008.