APA Citation

Porter, R. F., Christensen, S., & Schiermacker-Hansen, P. Birds of the Middle East.

Chicago Style Citation

Porter, R. F., S. Christensen, and P. Schiermacker-Hansen. Birds of the Middle East.

MLA Citation

Porter, R. F., S. Christensen, and P. Schiermacker-Hansen. Birds of the Middle East.

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