APA استشهاد

Bechtell, H. (1971). The theory of groups. Addison-Wesley Pub. Co.

استشهاد بنمط شيكاغو

Bechtell, Homer. The Theory of Groups. Reading, Mass.: Addison-Wesley Pub. Co, 1971.

MLA استشهاد

Bechtell, Homer. The Theory of Groups. Addison-Wesley Pub. Co, 1971.