Well, it has finally come to this: even a liturgical institute has to discuss evangelism. Almost certainly some people will look at the combination of liturgy and witness and observe from one point of view or another how this sort of thing could never have happened a generation ago.
Kolb, Robert, "Hit Men and Midwives: Christian Witness at Work and at Worship" (1987). Institute of Liturgical Studies Occasional Papers. 30.