APA (7th ed.) Citation

Urban, E. K. (1967). Shell guide to Ethiopian birds. Ethiopian Tourist Organization.

Chicago Style (17th ed.) Citation

Urban, Emil K. Shell Guide to Ethiopian Birds. Addis Ababa: Ethiopian Tourist Organization, 1967.

MLA (9th ed.) Citation

Urban, Emil K. Shell Guide to Ethiopian Birds. Ethiopian Tourist Organization, 1967.

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