APA-čujuhus (7. p.)
ebrary, Inc, & Boylan, M. (2014). Environmental ethics. Wiley-Blackwell.
Chicago-čujuhus (17. p.)
ebrary, Inc, juo Michael Boylan. Environmental Ethics. Chichester, England: Wiley-Blackwell, 2014.
MLA-čujuhus (9. p.)
ebrary, Inc, juo Michael Boylan. Environmental Ethics. Wiley-Blackwell, 2014.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.