Yorkey, R. (1981). Reply requested: 30 letters of advice. Addison Wesley Publishing Company.
Chicago-čujuhus (17. p.)Yorkey, Richard. Reply Requested: 30 Letters of Advice. Reading: Addison Wesley Publishing Company, 1981.
MLA-čujuhus (9. p.)Yorkey, Richard. Reply Requested: 30 Letters of Advice. Addison Wesley Publishing Company, 1981.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.