APA استشهاد

Richardson, E. (1953). Sound: A physical text-book (5th ed.). ELBS.

استشهاد بنمط شيكاغو

Richardson, E.G. Sound: A Physical Text-book. 5th ed. London: ELBS, 1953.

MLA استشهاد

Richardson, E.G. Sound: A Physical Text-book. 5th ed. ELBS, 1953.