APA (7th ed.) Citation

Hughes, N. C. (1994). Ontogeny, intraspecific variation, and systematics of the Late Cambrian trilobite Dikelocephalus. Smithsonian Institution Press.

Chicago Style (17th ed.) Citation

Hughes, Nigel C. Ontogeny, Intraspecific Variation, and Systematics of the Late Cambrian Trilobite Dikelocephalus. Washington, D.C.: Smithsonian Institution Press, 1994.

MLA (9th ed.) Citation

Hughes, Nigel C. Ontogeny, Intraspecific Variation, and Systematics of the Late Cambrian Trilobite Dikelocephalus. Smithsonian Institution Press, 1994.