Dyfyniad APA

Bruce, H. A. (1915). Sleep and sleeplessness. Little, Brown.

Dyfyniad Arddull Chicago

Bruce, H. Addington. Sleep and Sleeplessness. Boston: Little, Brown, 1915.

Dyfyniad MLA

Bruce, H. Addington. Sleep and Sleeplessness. Little, Brown, 1915.

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