Warnock, M. (1978). Ethics since 1900 (3rded.). O.U.P..
Chicago-čujuhus (17. p.)Warnock, Mary. Ethics Since 1900. 3rded. Oxford: O.U.P., 1978.
MLA-čujuhus (9. p.)Warnock, Mary. Ethics Since 1900. 3rded. O.U.P., 1978.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.