There is another discussion about Family Tree maker at
http://blackseagr.org/forums/viewtopic.php?f=5&t=40 but to answer your question I use FTM 16 and I have found the handling of citations/sources for facts to be pretty easy to use. Just position your your cursor on any fact and press Ctrl+S to either view, change or add a source.
None the less I don't like the tight integration with Ancestry.com and I think there are better Genealogy programs out there. I particularly like Legacy Family Tree and one of these days I will get the time to investigate it further!
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Regards, Murray
BlackSeaGR Forum co-Administrator
Gauer Family Website