Columbia subject headings:
Latin letters--History and criticism.
Letter writing, Latin--Handbooks, manuals, etc.
Spiritual direction--Handbooks, manuals, etc.
Harvard subject headings:
Latin letters--History and criticism
Letter writing, Latin--Handbooks, manuals, etc.
Spiritual direction--Handbooks, manuals, etc.
Princeton subject headings:
Latin language, Medieval and modern--Rhetoric.
Latin language, Medieval and modern--Style.