Cita APA (7a ed.)

Seliger, H. W., & Vago, R. M. (1991). First language attrition. Cambridge University Press.

Cita Chicago Style (17a ed.)

Seliger, Herbert W., y Robert M. Vago. First Language Attrition. Cambridge: Cambridge University Press, 1991.

Cita MLA (9a ed.)

Seliger, Herbert W., y Robert M. Vago. First Language Attrition. Cambridge University Press, 1991.