Cita APA (7a ed.)

Cowles, E. (1893). The mental symptoms of fatigue. [s.n.].

Cita Chicago Style (17a ed.)

Cowles, Edward. The Mental Symptoms of Fatigue. [S.l.]: [s.n.], 1893.

Cita MLA (9a ed.)

Cowles, Edward. The Mental Symptoms of Fatigue. [s.n.], 1893.