Cita APA (7a ed.)

Cohen, S., Tyrrell, D., & Smith, A. P. (1991). Psychological stress and susceptibility to the common cold. [s.n.].

Cita Chicago Style (17a ed.)

Cohen, Sheldon, David Tyrrell, y A. P. Smith. Psychological Stress and Susceptibility to the Common Cold. [S.l.]: [s.n.], 1991.

Cita MLA (9a ed.)

Cohen, Sheldon, et al. Psychological Stress and Susceptibility to the Common Cold. [s.n.], 1991.