Cottrell, D. (2013). The Magic Question. TMH.
Chicago-čujuhus (17. p.)Cottrell, David. The Magic Question. New delhi: TMH, 2013.
MLA-čujuhus (9. p.)Cottrell, David. The Magic Question. TMH, 2013.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.