Cita APA (7a ed.)

Geist, H. (1981). Psychological aspects of the aging process whit sociological implications. R. Krieger.

Cita Chicago Style (17a ed.)

Geist, Harold. Psychological Aspects of the Aging Process Whit Sociological Implications. New York: R. Krieger, 1981.

Cita MLA (9a ed.)

Geist, Harold. Psychological Aspects of the Aging Process Whit Sociological Implications. R. Krieger, 1981.