APA استشهاد

Burn, D. M. (1980). Encyclopedia of the animal world (in 21 volume). Octopus Books.

استشهاد بنمط شيكاغو

Burn, David M. Encyclopedia of the Animal World (in 21 Volume). London: Octopus Books, 1980.

MLA استشهاد

Burn, David M. Encyclopedia of the Animal World (in 21 Volume). Octopus Books, 1980.