Sweeney, D. R. (1989). Overcoming insonmia: A medical program for problem sleepers. G. P. Putnam's Sons.
Cita Chicago (17th ed.)Sweeney, Donald R. Overcoming Insonmia: A Medical Program for Problem Sleepers. G. P. Putnam's Sons, 1989.
Cita MLA (9th ed.)Sweeney, Donald R. Overcoming Insonmia: A Medical Program for Problem Sleepers. G. P. Putnam's Sons, 1989.
Atenció: Aquestes cites poden no estar 100% correctes.