Abbotts theory of professions (1988)
Abbott argues that within organizations, especially overworked ones like downsized hospitals, the divisions between professional jurisdictions often become blurred. A type of knowledge transfer occurs, which he calls workplace assimilation, that allows other workers to learn a craft version of a given professions knowledge system. He adds that in the jurisdictional system of the workplace, it is the real output of an individual, not credentialed or non-credentialized status, that matters.
Abbott, A. 1988. The system of professions. Chicago, IL: University of Chicago Press.