APA استشهاد

Townsend, C. (1989). Mastering dbase IV programming. BPB Publications.

استشهاد بنمط شيكاغو

Townsend, Carl. Mastering Dbase IV Programming. New Delhi: BPB Publications, 1989.

MLA استشهاد

Townsend, Carl. Mastering Dbase IV Programming. BPB Publications, 1989.