Cita APA (7a ed.)

Eichorn, D. H. (1981). Present and past in middle life. Academic Press.

Cita Chicago Style (17a ed.)

Eichorn, Dorothy H. Present and Past in Middle Life. New York: Academic Press, 1981.

Cita MLA (9a ed.)

Eichorn, Dorothy H. Present and Past in Middle Life. Academic Press, 1981.