Biggs, N. L. (2007). Discrete Mathematics (2nd.). Oxford University Press.
Chicago-čujuhus (17. p.)Biggs, Norman L. Discrete Mathematics. 2nd. Oxford University Press, 2007.
MLA-čujuhus (9. p.)Biggs, Norman L. Discrete Mathematics. 2nd. Oxford University Press, 2007.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.