Gaya APA

Tollen, A, C, E, ;, L, A. (2004). Toward a 21st Century Health System : the Contributions and Promise of Prepaid Group Practice . : Josey-Bass.

Gaya MLA

Tollen, Alain, C., Enthoven, ;, Laura, A.. "Toward a 21st Century Health System : the Contributions and Promise of Prepaid Group Practice". : Josey-Bass, 2004. Text.