Bono, E. D. (2009). Think! Before its too late. Vermilion.
Chicago-čujuhus (17. p.)Bono, Edward De. Think! Before Its Too Late. London: Vermilion, 2009.
MLA-čujuhus (9. p.)Bono, Edward De. Think! Before Its Too Late. Vermilion, 2009.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.