Schnell W J. (1971). Thirty years a watchtower slave (Abridged ed.). Baker House.
芝加哥风格引文Schnell W J. Thirty Years a Watchtower Slave. Abridged ed. Michigan: Baker House, 1971.
MLA引文Schnell W J. Thirty Years a Watchtower Slave. Abridged ed. Baker House, 1971.
警告：这些引文格式不一定是100％准确.