Citazione Stile APA (7a Edizione)

OToole, C. (1990). Insects and spiders: Encyclopedia of the animal world. Facts on File.

Citazione stile Chigago Style (17a edizione)

OToole, Christopher. Insects and Spiders: Encyclopedia of the Animal World. New York: Facts on File, 1990.

Citatione MLA (9a ed.)

OToole, Christopher. Insects and Spiders: Encyclopedia of the Animal World. Facts on File, 1990.