Friedrich, O. (1965). Ring Lardner. University of Minnesota Press.
Chicago-čujuhus (17. p.)Friedrich, Otto. Ring Lardner. Minnespolis: University of Minnesota Press, 1965.
MLA-čujuhus (9. p.)Friedrich, Otto. Ring Lardner. University of Minnesota Press, 1965.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.