APA استشهاد

Kirby,Mark. (1999). Stratification and differenciation. Mac Millan.

استشهاد بنمط شيكاغو

Kirby,Mark. Stratification and Differenciation. London: Mac Millan, 1999.

MLA استشهاد

Kirby,Mark. Stratification and Differenciation. Mac Millan, 1999.