Christiansen, F. B., & Fenchel, T. M. (1977). Measuring selection in natural populations. Springer-Verlag.
Chicago-čujuhus (17. p.)Christiansen, F. B., juo T. M. Fenchel. Measuring Selection in Natural Populations. Berlín: Springer-Verlag, 1977.
MLA-čujuhus (9. p.)Christiansen, F. B., juo T. M. Fenchel. Measuring Selection in Natural Populations. Springer-Verlag, 1977.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.