Reformed Theology

Can anyone point me to a scholarly article or book that clearly, definitively, and ***authoritatively*** defines what qualifies a person or denomination as "reformed"? I've heard Presbyterians claim that they are the only true reformed denomination; if this is the case, what authority is this based on, and why is it not just referred to either Presbyterianism (Presbyterian Theology) or Reformed Theology? For example, I consider myself a reformed, covenantal Calvinist (pretty much a non-denominational Calvinist), but since I believe in credo vs. paedobaptism, I've been told I am not reformed.