"Hail Mary", "Glory Be" in the plural [duplicate]

Possible Duplicate:
What is the proper way to write the plural of a single letter? (another apostrophe question)

In the rosary, a Catholic sacramental composed of prayer beads, there is a short prayer concluding each decade called "Glory Be" ("Glory be to the Father, Son and Holy Spirit...").

Would the plural be Glory Bes or Glory Be's?

Likewise, do you say 10 Hail Marys?

Solution 1:

At http://grammar.ccc.commnet.edu/grammar/plurals.htm under 'Plurals and Apostrophes' is given the claimed rule 'to form the plural of a word-as-a-word, put the word cited in italics and add 's in non-italics'. This would lead to 10 Glory Be's and 7 Hail Mary's. Assuming that the use of excerpt-as-a-title is considered a close enough modelling of the use of word-as-a-word.