Edgley, R. (1969). Reason in theory and practice. Hutchinson University library.
Chicago-čujuhus (17. p.)Edgley, Roy. Reason in Theory and Practice. London: Hutchinson University library, 1969.
MLA-čujuhus (9. p.)Edgley, Roy. Reason in Theory and Practice. Hutchinson University library, 1969.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.