Often they will cite a catechism instead of scripture, thats like an LDSer pulling out his Book of Mormon
Not really, as the BoM contains hardly anything that came be found that influences their practices and strange rites.
The BoM is like a chef mincing up a BIBLE and a Lord of the Rings knockoff and then making an omelet.
You want the GOOD stuff in Mormonism; you need to look into Salt Lake City's edition of the Doctrines & Covenants as well as the Pearl of Great Price.
Get all 4 (a suspect KJV is included) in an easy to carry Quad!