Cita APA (7th ed.)

Hudgins, C. V., & Numbers, F. C. (1942). An investigation of the intelligibility of the speech of the deaf. s.n.].

Cita Chicago (17th ed.)

Hudgins, C. V., i F. C. Numbers. An Investigation of the Intelligibility of the Speech of the Deaf. [s.l.: s.n.], 1942.

Cita MLA (8th ed.)

Hudgins, C. V., i F. C. Numbers. An Investigation of the Intelligibility of the Speech of the Deaf. s.n.], 1942.