APA

Capel A., . (2013). Objetive ket (student´s book). New York: Cambridge.

Chicago

Capel Annette, . 2013. Objetive ket (student´s book). New York: Cambridge.

Harvard

Capel A., . (2013). Objetive ket (student´s book). New York: Cambridge.

MLA

Capel Annette, . Objetive ket (student´s book). New York: Cambridge. 2013.