APA (7th ed.) Citation

Penney, D., & Selden, P. (2011). Fossil spiders: A the evolutionary history of a mega-diverse order. Siri Scientific Press.

Chicago Style (17th ed.) Citation

Penney, David, and Paul Selden. Fossil Spiders: A the Evolutionary History of a Mega-diverse Order. Manchester: Siri Scientific Press, 2011.

MLA (8th ed.) Citation

Penney, David, and Paul Selden. Fossil Spiders: A the Evolutionary History of a Mega-diverse Order. Siri Scientific Press, 2011.