APA (7th ed.) Citation

Rollin, B. E. (1990). The unheeded cry: Animal consciousness, animal pain, and science. Oxford University Press.

Chicago Style (17th ed.) Citation

Rollin, Bernard E. The Unheeded Cry: Animal Consciousness, Animal Pain, and Science. Oxford ; New York: Oxford University Press, 1990.

MLA (9th ed.) Citation

Rollin, Bernard E. The Unheeded Cry: Animal Consciousness, Animal Pain, and Science. Oxford University Press, 1990.