Currently, self-reflexivity is considered a trait without which historical knowledge and scientific knowledge in general cannot develop. Thus, the central problem of self-reflexivity is formulated with the following question: how to observe the observer in a particular operational field? This is what the notion of the “historiographical turn” attempts to express. Therefore, the framework within which the works presented here can be situated is articulated as a self-reflexive function, since it is what allows the historiographical operation to be reproduced as a whole. The following question remains: how is this possibility carried out? This book also outlines the new problems, which pertain both to the procedures employed and to the theoretical options developed.