Cita APA (7a ed.)

Pérez Ribelles, V. (1977). Fibrositis distal. [s.n.].

Cita Chicago Style (17a ed.)

Pérez Ribelles, V. Fibrositis Distal. [S.l.]: [s.n.], 1977.

Cita MLA (9a ed.)

Pérez Ribelles, V. Fibrositis Distal. [s.n.], 1977.