Nickel, G. (1974). Papers in contrastive linguistics. CUP.
Chicago Style aipamenaNickel, Gerhard. Papers in Contrastive Linguistics. Cambridge: CUP, 1974.
MLA aipamenaNickel, Gerhard. Papers in Contrastive Linguistics. CUP, 1974.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.