APA (7th ed.) Zitazioa

(1967). Speechcraft; a speech therapy workbook for any sound. Art work by William Silhan.

Chicago Style (17th ed.) Zitazioa

Speechcraft; a Speech Therapy Workbook for Any Sound. Art Work by William Silhan. 1967.

MLA (9th ed.) Zitazioa

Speechcraft; a Speech Therapy Workbook for Any Sound. Art Work by William Silhan. 1967.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.