Follow the example below and please note, the number reference in the footnotes refers to a section of that marriage ritual, rather than to a page number.
First footnote citation:
"The Order of Celebrating Matrimony Within Mass," The Order of Celebrating Matrimony: The Roman Ritual, 2nd ed. (St Pauls, 2015), sec. 60.
Subsequent footnote citations:
The Order of Celebrating Matrimony, sec. 60.
Bibliography:
The Order of Celebrating Matrimony: The Roman Ritual. 2nd ed. St Pauls, 2015.