APA (7th ed.) Citation

Rosenbaum, P. R. (1995). Observational studies (1. print.). Springer.

Chicago Style (17th ed.) Citation

Rosenbaum, Paul R. Observational Studies. 1. print. New York [u.a.]: Springer, 1995.

MLA (9th ed.) Citation

Rosenbaum, Paul R. Observational Studies. 1. print. Springer, 1995.