The Word of God in the Life of the Church: The Church and Her Ministry
Jack Miller Collection, St. Louis, Missouri
A footnote in “How to Overcome Introversion in the Small Church, Part 2” cites this on page 82.
It was first published by The Board of Education and Publication, Reformed Presbyterian Church, 1976.
Clair Davis included this is updated form in a May 1995 email to leadership of World Harvest Mission.