See also the home page of the Style book series MHRA Style Guide

MHRA Style Book: First Edition (1971)
Edited by A. S. Maney and R. L. Smallwood1 October 1971
MHRA Style Guide: Fourth Edition (2024)
Edited by Chloe Paver 20 February 2024
MHRA Style Guide: Third Edition (2013)
Edited by Brian Richardson1 January 2013