By The First Presidency and Council of the Twelve Apostles of the Church of Jesus Christ of Latter-Day Saints.

Full text:  https://www.churchofjesuschrist.org/study/manual/the-family-a-proclamation-to-the-world/the-family-a-proclamation-to-the-world?lang=eng

This proclamation was read by President Gordon B. Hinckley as part of his message at the General Relief Society Meeting held September 23, 1995, in Salt Lake City, Utah.

(It remains a flagship statement of the church and has become more relevant as time goes on.)