Complex sentence: A Guide for Authors and Editors is a style guide by the editors of "JAMA" (Journal of the American Medical Association) and the "Archives Journals", most recently published by Oxford University Press.
Split into simpler sentences: A Guide for Authors and Editors is the style guide of the American Medical Association. It is written by the editors of "JAMA" ("Journal of the American Medical Association ") and the"Archives" journals and is most recently published by Oxford University Press.