Citazione Stile APA (7a Edizione)

Shapiro, A. M. (2007). Field guide to butterflies of the San Francisco Bay and Sacramento Valley regions. University of California Press.

Citazione stile Chigago Style (17a edizione)

Shapiro, Arthur M. Field Guide to Butterflies of the San Francisco Bay and Sacramento Valley Regions. Berkeley: University of California Press, 2007.

Citatione MLA (9a ed.)

Shapiro, Arthur M. Field Guide to Butterflies of the San Francisco Bay and Sacramento Valley Regions. University of California Press, 2007.