APA (7th ed.) Citation

Gilbertson, D. D., Kent, M., & Pyatt, F. B. (1989). Practical ecology for geography and biology: Survey, mapping and data analysis (2. impr.). Unwin Hyman.

Chicago Style (17th ed.) Citation

Gilbertson, David D., Martin Kent, and F. B. Pyatt. Practical Ecology for Geography and Biology: Survey, Mapping and Data Analysis. 2. impr. London [u.a.]: Unwin Hyman, 1989.

MLA (9th ed.) Citation

Gilbertson, David D., et al. Practical Ecology for Geography and Biology: Survey, Mapping and Data Analysis. 2. impr. Unwin Hyman, 1989.