Dyfyniad APA

Sweeney, D. R. (1989). Overcoming insonmia: A medical program for problem sleepers. G. P. Putnam's Sons.

Dyfyniad Arddull Chicago

Sweeney, Donald R. Overcoming Insonmia: A Medical Program for Problem Sleepers. G. P. Putnam's Sons, 1989.

Dyfyniad MLA

Sweeney, Donald R. Overcoming Insonmia: A Medical Program for Problem Sleepers. G. P. Putnam's Sons, 1989.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.