APA استشهاد

Bilas, R. (1967). Micro- economic theory/2nd ed (2nd ed.). Mc Graw hills.

استشهاد بنمط شيكاغو

Bilas, Richard. Micro- Economic Theory/2nd Ed. 2nd ed. Sydney: Mc Graw hills, 1967.

MLA استشهاد

Bilas, Richard. Micro- Economic Theory/2nd Ed. 2nd ed. Mc Graw hills, 1967.