Governance General Interest
The American Association of University Professors (AAUP) , adopted in 1967 and revised in 1990, is often referred to as a foundational document.
In 1987, the National Education Association (NEA) also published a policy statement on . That link is to a Wikipedia description, as the policy has disappeared from the NEA website.
Kezar and Eckel published this literature review in 2004.