APA (7th ed.) Citation

Shackelford, C. E. (2000). Rare and declining birds of Texas: Conservation needed. Texas Parks & Wildlife.

Chicago Style (17th ed.) Citation

Shackelford, Clifford Eugene. Rare and Declining Birds of Texas: Conservation Needed. Austin, Tex.: Texas Parks & Wildlife, 2000.

MLA (9th ed.) Citation

Shackelford, Clifford Eugene. Rare and Declining Birds of Texas: Conservation Needed. Texas Parks & Wildlife, 2000.