Sutherland, W. J. (1996). Ecological Census Techniques: A Handbook (2nd ed.). Cambridge University.
Chicago-čujuhus (17. p.)Sutherland, William J. Ecological Census Techniques: A Handbook. 2nd ed. Cambridge: Cambridge University, 1996.
MLA-čujuhus (9. p.)Sutherland, William J. Ecological Census Techniques: A Handbook. 2nd ed. Cambridge University, 1996.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.