Craighead, J. J., Craighead, F. C., & Davis, R. C. (1991). A field guide to Rocky Mountain wildflowers from Northern Arizona and New Mexico to British Columbia. Houghton Mifflin.
Chicago-Zitierstil (17. Ausg.)Craighead, John J., Frank C. Craighead, und Ray C. Davis. A Field Guide to Rocky Mountain Wildflowers from Northern Arizona and New Mexico to British Columbia. Boston [u.a.]: Houghton Mifflin, 1991.
MLA-Zitierstil (9. Ausg.)Craighead, John J., et al. A Field Guide to Rocky Mountain Wildflowers from Northern Arizona and New Mexico to British Columbia. Houghton Mifflin, 1991.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.