Cita APA

Erikson, E. H., & Erikson, J. M. (1986). Vital involvement in old age. New York: Norton.

Chicago Style Citation

Erikson, Erik H., i Joan M. Erikson. Vital Involvement in Old Age. New York: Norton, 1986.

Cita MLA

Erikson, Erik H., i Joan M. Erikson. Vital Involvement in Old Age. New York: Norton, 1986.