Sweeney, D. R. (1989). Overcoming insonmia: A medical program for problem sleepers. G. P. Putnam's Sons.
Citazione stile Chigago Style (17a edizione)Sweeney, Donald R. Overcoming Insonmia: A Medical Program for Problem Sleepers. G. P. Putnam's Sons, 1989.
Citatione MLA (9a ed.)Sweeney, Donald R. Overcoming Insonmia: A Medical Program for Problem Sleepers. G. P. Putnam's Sons, 1989.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.