Lasagabaster, David. 2004. Attitude. In , Sociolinguistics. An International Handbook of the Science of Language and Society, vol. 1, 399?405. 2nd ed. (Sociolinguistics. An International Handbook Of The Science Of Language And Society). Berlin ; New York: Walter de Gruyter.

Deprez, Kas & Yves  Persoons. 1988. Attitude. In , Sociolinguistics : An International Handbook of the Science of Language and Society, vol. 1, 125?131. (Sociolinguistics : An International Handbook Of The Science Of Language And Society). Berlin ; New York: Walter de Gruyter.

Giles, Howard, Miles  Hewstone, Ellen B Ryan & Patricia  Johnson. 1988. Research on language attitudes. In , Sociolinguistics. An International Handbook of the Science of Language and Society, vol. 1, 585?597. (Sociolinguistics. An International Handbook Of The Science Of Language And Society). Berlin ; New York: Walter de Gruyter.