APA aipamena

W F Twaddell. (1963). The English verb auxiliaries. Rholde Island: Brown Univ.

Chicago Style aipamena

W F Twaddell. The English Verb Auxiliaries. Rholde Island: Brown Univ, 1963.

MLA aipamena

W F Twaddell. The English Verb Auxiliaries. Rholde Island: Brown Univ, 1963.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.