Cita APA (7a ed.)

Gilbertson, D. D., Kent, M., & Pyatt, F. B. (1990). Practical ecology for geography and biology: Survey, mapping and data analysis (3rd imp.). Unwin Hyman.

Cita Chicago Style (17a ed.)

Gilbertson, D. D., M. Kent, y F. B. Pyatt. Practical Ecology for Geography and Biology: Survey, Mapping and Data Analysis. 3rd imp. London [etc.]: Unwin Hyman, 1990.

Cita MLA (9a ed.)

Gilbertson, D. D., et al. Practical Ecology for Geography and Biology: Survey, Mapping and Data Analysis. 3rd imp. Unwin Hyman, 1990.