George, L. K., & Okun, M. A. (1985). Self Concept Content in a Sample of Middle Aged and Older Adults. In P. J. Nowlin, I. C. Siegler, E. W. Busse, & G. L. Maddox (Eds.), Normal Aging III. Durham, NC: Duke University Press.

George, L. K., and M. A. Okun. “Self Concept Content in a Sample of Middle Aged and Older Adults.” In Normal Aging III, edited by P. J. Nowlin, I. C. Siegler, E. W. Busse, and G. L. Maddox. Durham, NC: Duke University Press, 1985.

George LK, Okun MA. Self Concept Content in a Sample of Middle Aged and Older Adults. In: Nowlin PJ, Siegler IC, Busse EW, Maddox GL, editors. Normal Aging III. Durham, NC: Duke University Press; 1985.

George, L. K., and M. A. Okun. “Self Concept Content in a Sample of Middle Aged and Older Adults.” Normal Aging III, edited by P. J. Nowlin et al., Duke University Press, 1985.

George LK, Okun MA. Self Concept Content in a Sample of Middle Aged and Older Adults. In: Nowlin PJ, Siegler IC, Busse EW, Maddox GL, editors. Normal Aging III. Durham, NC: Duke University Press; 1985.