Cita APA (7a ed.)

Armstrong, D. F. (1999). Original Signs: Gesture, Sign, and the Sources of Language. Gallaudet University Press.

Cita Chicago Style (17a ed.)

Armstrong, David F. Original Signs: Gesture, Sign, and the Sources of Language. Washington, D.C.: Gallaudet University Press, 1999.

Cita MLA (8a ed.)

Armstrong, David F. Original Signs: Gesture, Sign, and the Sources of Language. Gallaudet University Press, 1999.