Cita APA (7a ed.)

Gilbert, G., Gibbons, D. W., & Evans, J. (1998). Bird monitoring methods: A manual of techniques for key UK species. The Royal Society for the Protection of Birds.

Cita Chicago Style (17a ed.)

Gilbert, Gillian, David W. Gibbons, y Julianne Evans. Bird Monitoring Methods: A Manual of Techniques for Key UK Species. The Lodge, Bedfordshire: The Royal Society for the Protection of Birds, 1998.

Cita MLA (9a ed.)

Gilbert, Gillian, et al. Bird Monitoring Methods: A Manual of Techniques for Key UK Species. The Royal Society for the Protection of Birds, 1998.