You can see the style guide at the help center.

The duration of Tim Gunn's Guide to Style is 3600.0 seconds.

Guide to Style - 2007 is rated/received certificates of:

Australia:PG

Tim Gunn's Guide to Style was created on 2007-09-06.

Your answer depends on the style guide established by the publisher.

For example, in academia, there is a style guide. In journalism, there is a different style guide.

If you don't know which style guide dictates the presentation of titles in your work, pick one and be consistent.

Your library will have style manuals that can offer you samples and options.

An excellent basic guide for writers is the Chicago Manual of Style, link below.