APA (7e ed.) Bronvermelding

Sheffield. Helen Keller Really Lived. The University of Alabama Press.

Chicago (17e ed.) Bronvermelding

Sheffield. Helen Keller Really Lived. The University of Alabama Press.

MLA (8e ed.) Bronvermelding

Sheffield. Helen Keller Really Lived. The University of Alabama Press.

Let op: Deze citaties zijn niet altijd 100% accuraat.