APA (7th ed.) Citation

Denison, R. H. (1970). Revised clasification of Pteraspididae with description of new forms from Wyoming.

Chicago Style (17th ed.) Citation

Denison, Robert H. Revised Clasification of Pteraspididae with Description of New Forms from Wyoming. Chicago, Ill, 1970.

MLA (9th ed.) Citation

Denison, Robert H. Revised Clasification of Pteraspididae with Description of New Forms from Wyoming. 1970.