Cita APA (7th ed.)

O' Grady , W. (1989). Contemporary linguistics: An introduction. St. Martin's pr..

Cita Chicago (17th ed.)

O' Grady , William. Contemporary Linguistics: An Introduction. NewYork: St. Martin's pr., 1989.

Cita MLA (9th ed.)

O' Grady , William. Contemporary Linguistics: An Introduction. St. Martin's pr., 1989.