APA (7th ed.) Citation

H. D. & Spoo, R. E. (1992). Asphodel. Duke University Press.

Chicago Style (17th ed.) Citation

H. D. and Robert E. Spoo. Asphodel. Durham: Duke University Press, 1992.

MLA (9th ed.) Citation

H. D. and Robert E. Spoo. Asphodel. Duke University Press, 1992.