APA (7th ed.) Citation

Tull, D., & Miller, G. O. (1991). A field guide to wildflowers, trees & shrubs of Texas. Gulf Pub. Co..

Chicago Style (17th ed.) Citation

Tull, Delena, and George Oxford Miller. A Field Guide to Wildflowers, Trees & Shrubs of Texas. Houston, Tex.: Gulf Pub. Co., 1991.

MLA (9th ed.) Citation

Tull, Delena, and George Oxford Miller. A Field Guide to Wildflowers, Trees & Shrubs of Texas. Gulf Pub. Co., 1991.