Pennsylvania University. Schoolmen's Week. Proceedings.
Chicago-čujuhus (17. p.)Pennsylvania University. Schoolmen's Week. Proceedings.
MLA-čujuhus (9. p.)Pennsylvania University. Schoolmen's Week. Proceedings.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.