Sutherland, W. J. (1996). Ecological Census Techniques: A Handbook (2nd ed.). Cambridge University.
Chicago Style (17th ed.) ZitazioaSutherland, William J. Ecological Census Techniques: A Handbook. 2nd ed. Cambridge: Cambridge University, 1996.
MLA (9th ed.) ZitazioaSutherland, William J. Ecological Census Techniques: A Handbook. 2nd ed. Cambridge University, 1996.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.