Cita APA (7th ed.)
Erikson, E. H. (1965). The challenge of youth .. Doubleday.
Cita Chicago (17th ed.)
Erikson, Erik H. The Challenge of Youth .. Garden City, N. Y.: Doubleday, 1965.
Cita MLA (9th ed.)
Erikson, Erik H. The Challenge of Youth .. Doubleday, 1965.
Atenció: Aquestes cites poden no estar 100% correctes.