APA-Zitierstil (7. Ausg.)

Keller, H. (1913). Out of the dark: Essays, letters, and addresses on physical and social vision. Doubleday.

Chicago-Zitierstil (17. Ausg.)

Keller, Helen. Out of the Dark: Essays, Letters, and Addresses on Physical and Social Vision. Garden City, NY: Doubleday, 1913.

MLA-Zitierstil (9. Ausg.)

Keller, Helen. Out of the Dark: Essays, Letters, and Addresses on Physical and Social Vision. Doubleday, 1913.