APA استشهاد

(1973). Biological science: An ecologicla approach (3.). Rand mcnally and company.

استشهاد بنمط شيكاغو

Biological Science: An Ecologicla Approach. 3. Chicago: Rand mcnally and company, 1973.

MLA استشهاد

Biological Science: An Ecologicla Approach. 3. Rand mcnally and company, 1973.