Parker gave the English people the "Bishops' Bible", which was undertaken at his request, prepared under his supervision, and published at his expense in 1572. Much of his time and labour from 1563 to 1568 was given to this work. He had also the principal share in drawing up the "Book of Common Prayer", for which his skill in ancient liturgies peculiarly fitted him. His liturgical skill was also shown in his version of the psalter. It was under his presidency that the Thirty-nine Articles were finally reviewed and subscribed by the clergy (1562).