*{{cite book
|last = Watch Tower Bible & Tract Society
|title = 1975 Yearbook
|publisher = Watch Tower Bible & Tract Society
|year = 1975}}
*{{cite book
|last = Watch Tower Bible & Tract Society
|title = Jehovah's Witnesses in the Divine Purpose
|publisher = Watch Tower Bible & Tract Society
|year = 1959}}
*{{cite book
|last = Watch Tower Bible & Tract Society
|title = Jehovah's Witnesses – Proclaimers of God's Kingdom
|publisher = Watch Tower Bible & Tract Society
|year = 1993}}
*{{cite book
|last = Macmillan
|first = A.H.
|title = Faith on the March
|publisher = Prentice-Hall
|year = 1957
|url = http://www.e-cepher.com/books/fotm/
|access-date = 16. maj 2011
|archive-date =  7. september 2009
|archive-url = https://web.archive.org/web/20090907051808/http://www.e-cepher.com/books/fotm/
|url-status = dead
}}
*{{cite journal
|last = Rutherford
|first = J.F.
|title = Harvest Siftings
|publisher = Watch Tower Bible & Tract Society
|date = 1. august 1917
|url = http://www.pastor-russell.com/legacy/hs.pdf
|access-date = 16. maj 2011
|archive-date = 15. juli 2011
|archive-url = https://web.archive.org/web/20110715051950/http://www.pastor-russell.com/legacy/hs.pdf
|url-status = dead
}}
*{{cite journal
|last = Rutherford
|first = J.F.
|title = Harvest Siftings, Part II
|publisher = Watch Tower Bible & Tract Society
|date = 1. oktober 1917
|url = http://www.pastor-russell.com/legacy/hs2.pdf
|access-date = 16. maj 2011
|archive-date = 15. juli 2011
|archive-url = https://web.archive.org/web/20110715052039/http://www.pastor-russell.com/legacy/hs2.pdf
|url-status = dead
}}
*{{cite journal
|last = Johnson
|first = Paul S.L.
|title = Harvest Siftings Reviewed
|date = 1. november 1917
|url = http://www.pastor-russell.com/legacy/hsr.pdf
|access-date = 16. maj 2011
|archive-date = 15. juli 2011
|archive-url = https://web.archive.org/web/20110715053315/http://www.pastor-russell.com/legacy/hsr.pdf
|url-status = dead
}}
*{{cite book
|last=Gruss
|first=Edmond C., editor
|author-link=Edmond C. Gruss
|title=The Four Presidents of the Watch Tower Society
|publisher=Xulon Press
|year=2003
|isbn=1594671311}}
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