Cita APA (7a ed.)

Johnstone, E. C. (1987). The relative stability of positive and negative features in chronic schizophrenia. The British journal of psychiatry, 150, 60-64.

Cita Chicago Style (17a ed.)

Johnstone, E. C. "The Relative Stability of Positive and Negative Features in Chronic Schizophrenia." The British Journal of Psychiatry 150 (1987): 60-64.

Cita MLA (8a ed.)

Johnstone, E. C. "The Relative Stability of Positive and Negative Features in Chronic Schizophrenia." The British Journal of Psychiatry, vol. 150, 1987, pp. 60-64.