Cita APA (7a ed.)

Plank, F. (2003). Double articulation. [s.n.].

Cita Chicago Style (17a ed.)

Plank, Frans. Double Articulation. [S.l.]: [s.n.], 2003.

Cita MLA (9a ed.)

Plank, Frans. Double Articulation. [s.n.], 2003.