APA

Erikson E. H., Erikson J. M., . (1997). The life cycle completed. New York, N.Y: W.W. Norton.

Chicago

Erikson Erik H, Erikson Joan M, . 1997. The life cycle completed. New York, N.Y: W.W. Norton.

Harvard

Erikson E. H., Erikson J. M., . (1997). The life cycle completed. New York, N.Y: W.W. Norton.

MLA

Erikson Erik H, Erikson Joan M, . The life cycle completed. New York, N.Y: W.W. Norton. 1997.