Burton, R. (1990). Bird Feeder Handbook. Dorling Kindersley.
Citación estilo ChicagoBurton, Robert. Bird Feeder Handbook. London: Dorling Kindersley, 1990.
Cita MLABurton, Robert. Bird Feeder Handbook. Dorling Kindersley, 1990.
Warning: These citations may not always be 100% accurate.