14.28Short form for titles
The short title contains the key word or words from the main title. An initial A or The is usually omitted. The order of the words should not be changed (for example, Daily Notes of a Trip around the World should be shortened not to World Trip but to Daily Notes or Around the World). Titles of four words or fewer are seldom shortened. The short title is italicized or set in roman and quotation marks according to the way the full title appears.
In short titles in languages other than English, no word should be omitted that governs the case ending of a word included in the short title. If in doubt, ask someone who knows the language.