Unitt, P., Klovstad, A. E., Haas, W. E., Mock, P. J., Winter, K. J., & Mercieca, A. (2004). San Diego County bird atlas. San Diego : [S.l.]: San Diego Natural History Museum ; Ibis Pub..

Unitt, Philip., Ann E. Klovstad, William E. Haas, Patrick J. Mock, Kirsten J. Winter, and Anthony Mercieca. San Diego County Bird Atlas. San Diego : [S.l.]: San Diego Natural History Museum ; Ibis Pub., 2004.

Unitt, Philip., et al. San Diego County Bird Atlas. San Diego : [S.l.]: San Diego Natural History Museum ; Ibis Pub., 2004.