APA (7th ed.) Citation

Folzenlogen, R. (1986). Birding guide to the Denver-Boulder region. Pruett Pub..

Chicago Style (17th ed.) Citation

Folzenlogen, Robert. Birding Guide to the Denver-Boulder Region. Boulder: Pruett Pub., 1986.

MLA (9th ed.) Citation

Folzenlogen, Robert. Birding Guide to the Denver-Boulder Region. Pruett Pub., 1986.

Warning: These citations may not always be 100% accurate.