Special Approaches or Topics About Art Historians Explanatory Texts Kleinbauer, W. Eugene, and Thomas P. Slavens. Research Guide to the History of Western Art . American Library Association, 1982. Contains an annotated list of major reference works and supplies a brief description of methodological approaches. Kleinbauer, W. Eugene.
Lengthy introduction explains various methodologies which are then illustrated by essays.
Principles of Art History. Schlosser, Julius von. Quellenkunde der neuern Kunstgeschichte. Schlosser, Julius von. A important early source for methodology, although not complete in the Italian translation.