Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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