Catechism of the Catholic Church printed in 1994. This is the “official” teaching of the Catholic Church, with the introduction from John Paul himself.
The catechism is numbered by individual teaching. Some examples follow:
#493 “By the grace of God Mary remained free of every personal sin her whole life long”
#721 “Mary the all holy ever-virgin Mother of God…”
#722 …”She was, by sheer grace, conceived without sin…”
#966 “Finally the Immaculate Virgin, preserved free from all stain of original sin, when the course of her earthly life was finished, was taken up body and soul into heavenly glory, and exalted by the Lord as Queen over all things, so that she might be the more fully conformed to her son, the lord of lords and conqueror of sin and death.”