Dyfyniad APA
ebrary, Inc, Leventhal, H., Schaie, K. W., & Willis, S. L. (2002). Effective health behavior in older adults. Springer Pub. Co..
Dyfyniad Arddull Chicago
ebrary, Inc, Howard Leventhal, K. Warner Schaie, and Sherry L. Willis. Effective Health Behavior in Older Adults. New York: Springer Pub. Co., 2002.
Dyfyniad MLA
ebrary, Inc, et al. Effective Health Behavior in Older Adults. Springer Pub. Co., 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.