APA-referens (7:e uppl.)

Schnell W J. (1971). Thirty years a watchtower slave (Abridged ed.). Baker House.

Chicago-referens (17:e uppl.)

Schnell W J. Thirty Years a Watchtower Slave. Abridged ed. Michigan: Baker House, 1971.

MLA-referens (9:e uppl.)

Schnell W J. Thirty Years a Watchtower Slave. Abridged ed. Baker House, 1971.