APA (7e ed.) Bronvermelding

Duke, I. (2004). The everything sign language book: American sigh language made easy. Adams Media.

Chicago (17e ed.) Bronvermelding

Duke, Irene. The Everything Sign Language Book: American Sigh Language Made Easy. Avon, Mass: Adams Media, 2004.

MLA (9e ed.) Bronvermelding

Duke, Irene. The Everything Sign Language Book: American Sigh Language Made Easy. Adams Media, 2004.