Cita APA (7a ed.)

Knopman, D. S., & Ryberg, S. (1989). A verbal memory test with high predictive accuracy for dementia of the Alzheimer type. [s.n.].

Cita Chicago Style (17a ed.)

Knopman, David S., y Soren Ryberg. A Verbal Memory Test with High Predictive Accuracy for Dementia of the Alzheimer Type. [S.l.]: [s.n.], 1989.

Cita MLA (9a ed.)

Knopman, David S., y Soren Ryberg. A Verbal Memory Test with High Predictive Accuracy for Dementia of the Alzheimer Type. [s.n.], 1989.