APA (7th ed.) Citation

Ratledge, D. (2000). Observing the Caldwell objects. Springer.

Chicago Style (17th ed.) Citation

Ratledge, David. Observing the Caldwell Objects. London ; New York: Springer, 2000.

MLA (9th ed.) Citation

Ratledge, David. Observing the Caldwell Objects. Springer, 2000.