APA (7th ed.) Citation

Porter, R. F., Birch, A., Gale, J., Langman, M., & Small, B. (1996). Field guide to the birds of the middle east. T. & A. D. Poyser.

Chicago Style (17th ed.) Citation

Porter, R. F., A. Birch, J. Gale, M. Langman, and B. Small. Field Guide to the Birds of the Middle East. London: T. & A. D. Poyser, 1996.

MLA (8th ed.) Citation

Porter, R. F., et al. Field Guide to the Birds of the Middle East. T. & A. D. Poyser, 1996.