APA-čujuhus (7. p.)
Lyons, C. R. Bertolt Brecht: The Despair and the Polemic. Southern Illinois University.
Chicago-čujuhus (17. p.)
Lyons, Charles R. Bertolt Brecht: The Despair and the Polemic. Carbondale, EUA: Southern Illinois University.
MLA-čujuhus (9. p.)
Lyons, Charles R. Bertolt Brecht: The Despair and the Polemic. Southern Illinois University.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.