Barker, R. C. (1988). The power of decision. Dood Mead.
Chicago-čujuhus (17. p.)Barker, Raymond Charles. The Power of Decision. Dood Mead, 1988.
MLA-čujuhus (9. p.)Barker, Raymond Charles. The Power of Decision. Dood Mead, 1988.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.