Cita APA (7a ed.)

Watts, F. N., & Sharrock, R. (1985). Description and measurement of concentration problems in depressed patients. [s.n.].

Cita Chicago Style (17a ed.)

Watts, Fraser N., y Robert Sharrock. Description and Measurement of Concentration Problems in Depressed Patients. [S.l.]: [s.n.], 1985.

Cita MLA (9a ed.)

Watts, Fraser N., y Robert Sharrock. Description and Measurement of Concentration Problems in Depressed Patients. [s.n.], 1985.