APA استشهاد

(1989). Bibliography of doctoral dissertations: Natural and applied sciences 1989.

استشهاد بنمط شيكاغو

Bibliography of Doctoral Dissertations: Natural and Applied Sciences 1989. New Delhi, Association of Indian Universities, 1989.

MLA استشهاد

Bibliography of Doctoral Dissertations: Natural and Applied Sciences 1989. 1989.