For a discussion of how to calculate these prophetic periods, see Our Incoming World Government ​ — God’s Kingdom, chapter 8, published by the Watchtower Bible and Tract Society of New York, Inc.
Për një trajtim të mënyrës se si llogariten këto periudha profetike shiko Our Incoming World Government ​ — God’s Kingdom, kapitulli 8, botuar nga Watchtower Bible and Tract Society of New York, Inc.