APA

Erikson E., Erikson Joan M & Kivnick Helen Q. (1986). Vital involvement in old age. New York: Norton.

Chicago

Erikson Erik, Erikson Joan M and Kivnick Helen Q. 1986. Vital involvement in old age. New York: Norton.

Harvard

Erikson E., Erikson Joan M and Kivnick Helen Q. (1986). Vital involvement in old age. New York: Norton.

MLA

Erikson Erik, Erikson Joan M and Kivnick Helen Q. Vital involvement in old age. New York: Norton. 1986.