Rutherford, J. F. (1933). Preparation: The revelation of the prophecy of Zechariah showing Jehovah and his enemies preparing for the final war, and describing the great battle and the conclusion thereof in a glorious victory and the establishment of peace on earth and good will toward men, and the everlasting vindication of Jehovah's name. Watch Tower Bible and Tract Society, International Bible Student Assocation.

Rutherford, Joseph Franklin. Preparation: The Revelation of the Prophecy of Zechariah Showing Jehovah and His Enemies Preparing for the Final War, and Describing the Great Battle and the Conclusion Thereof in a Glorious Victory and the Establishment of Peace on Earth and Good Will Toward Men, and the Everlasting Vindication of Jehovah's Name. Brooklyn, N.Y: Watch Tower Bible and Tract Society, International Bible Student Assocation, 1933.

Rutherford, Joseph Franklin. Preparation: The Revelation of the Prophecy of Zechariah Showing Jehovah and His Enemies Preparing for the Final War, and Describing the Great Battle and the Conclusion Thereof in a Glorious Victory and the Establishment of Peace on Earth and Good Will Toward Men, and the Everlasting Vindication of Jehovah's Name. Watch Tower Bible and Tract Society, International Bible Student Assocation, 1933.