APA aipamena

(1989). Building skills for the TOEFL Carol King. s.n.

Chicago Style aipamena

Building Skills for the TOEFL Carol King. s.n, 1989.

MLA aipamena

Building Skills for the TOEFL Carol King. s.n, 1989.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.