Cita APA (7a ed.)

Ray, C., Phillips, L., & Weir, W. R. C. (1993). Quality of attention in chronic fatigue syndrome: Subjective reports of everyday attention and cognitive difficulty, and performance on tasks of focused attention. [s.n.].

Cita Chicago Style (17a ed.)

Ray, Colette, Lin Phillips, y William R. C. Weir. Quality of Attention in Chronic Fatigue Syndrome: Subjective Reports of Everyday Attention and Cognitive Difficulty, and Performance on Tasks of Focused Attention. [S.l.]: [s.n.], 1993.

Cita MLA (9a ed.)

Ray, Colette, et al. Quality of Attention in Chronic Fatigue Syndrome: Subjective Reports of Everyday Attention and Cognitive Difficulty, and Performance on Tasks of Focused Attention. [s.n.], 1993.