I'm going to piss everybody off....

I think one of the problems is that anthropologists aren't scientists. Well, not bottle and beaker kind. The FM is more like a lab manual than a text book or journal article. Though a lab manual might have some references, the concepts, ideas, and even language found in a chemistry lab manual isn't going to be cited verbatim. Ideas and lanague are going to be reported as actionable items that the student or audience are going to do. Not research. Looking through my technology lab manual for TCP/IP nowhere does it cite Vint Cerf when discussing the principles of TCP/IP. Now grab my text book or any of hundreds of journal articles and there you go... Cited. Even in academia we have different standards. Oh, in the aforementioned lab manual it does have end notes discussing a variety of topics and some things are cited here and there.