@ToniHahn referred to study references that "may be older but still relevant so these are the top references that were used. We do not limit what reference an item writer can use with the exception of a few. "
Toni, and all of the exam teams,
PLEASE change your guidelines to limit necessary references for new certification aspirants to only those currently available from the original authoritative source. If it is essential to study PMBOK editions 3, 4, and 5, but it is only possible to obtain edition 5 from the Project Management Institute, this is a major problem. In fact, it is the very problem of the old one I mentioned, of requiring the IATF from NSA long after NSA stopped making it available. Even if the old publication can be found on some secondary archive source, the fact that it is no longer current according to the original publisher means that we should not use it as a current source. A perfect example is the huge change in password management advice as NIST updated SP 800-63 last year.
If a new or replacement edition appears, review the question pool for older edition questions to confirm the Q&A are still covered in the new edition. If a reference disappears from the original authoritative source, remove all questions based on that reference.
