Cita APA (7a ed.)

Gjessing, H., & Karlsen, B. (1989). A longitudinal study of dyslexia: Bergen's multivariate study of children's learning disabilities. Springer.

Cita Chicago Style (17a ed.)

Gjessing, Hans-Jörgen, y Bjorn Karlsen. A Longitudinal Study of Dyslexia: Bergen's Multivariate Study of Children's Learning Disabilities. New York Berlin Heidelberg [u.a.]: Springer, 1989.

Cita MLA (9a ed.)

Gjessing, Hans-Jörgen, y Bjorn Karlsen. A Longitudinal Study of Dyslexia: Bergen's Multivariate Study of Children's Learning Disabilities. Springer, 1989.