APA استشهاد

Gunther, A. (1981). Catalogue of the physostomi in the collection of British museum.

استشهاد بنمط شيكاغو

Gunther, Albert. Catalogue of the Physostomi in the Collection of British Museum. A J Reprints Agency, New Delhi, 1981.

MLA استشهاد

Gunther, Albert. Catalogue of the Physostomi in the Collection of British Museum. 1981.