APA استشهاد

Liu,C.L. (1985). Elements of discrete mathematics. (2nd.). Mcraw hill.

استشهاد بنمط شيكاغو

Liu,C.L. Elements of Discrete Mathematics. 2nd. N,Delhi: Mcraw hill, 1985.

MLA استشهاد

Liu,C.L. Elements of Discrete Mathematics. 2nd. Mcraw hill, 1985.