Cita APA (7a ed.)

Bryson, S. E., & Werker, J. F. (1989). Toward understanding the problem in severely disabled readers: Part I, Vowel errors. [s.n.].

Cita Chicago Style (17a ed.)

Bryson, Susan E., y Janet F. Werker. Toward Understanding the Problem in Severely Disabled Readers: Part I, Vowel Errors. [S.l.]: [s.n.], 1989.

Cita MLA (9a ed.)

Bryson, Susan E., y Janet F. Werker. Toward Understanding the Problem in Severely Disabled Readers: Part I, Vowel Errors. [s.n.], 1989.