Cita APA (7a ed.)

Longacre, R. E. (1952). Five Phonemic Pitch Levels in Trique. [s.n.].

Cita Chicago Style (17a ed.)

Longacre, Robert E. Five Phonemic Pitch Levels in Trique. [S.l.]: [s.n.], 1952.

Cita MLA (9a ed.)

Longacre, Robert E. Five Phonemic Pitch Levels in Trique. [s.n.], 1952.