Frisen, L. (1990). Clinical tests of vision. Raven Press.
Cita Chicago (17th ed.)Frisen, Lars. Clinical Tests of Vision. New York: Raven Press, 1990.
Cita MLA (9th ed.)Frisen, Lars. Clinical Tests of Vision. Raven Press, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.