APA استشهاد

Sawyer, W. W. (1959). Concrete approach to abstract algebra. Freeman.

استشهاد بنمط شيكاغو

Sawyer, W W. Concrete Approach to Abstract Algebra. London: Freeman, 1959.

MLA استشهاد

Sawyer, W W. Concrete Approach to Abstract Algebra. Freeman, 1959.