Liu, C. (1985). Elements of Discrete Mathematics (2nd.).
Chicago-čujuhus (17. p.)Liu, C.L. Elements of Discrete Mathematics. 2nd. McGraw Hill Book Company, 1985.
MLA-čujuhus (9. p.)Liu, C.L. Elements of Discrete Mathematics. 2nd. 1985.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.