You can also call on an external style sheet by importing it.
To import an external style sheet:
Within the style element (see page 131), but before any individual style rules, type @import "external.css";, where external.css is the name of your CSS style sheet (see step 3 on page 128) (Figure 8.15).
Figure 8.15. The @import rule must be placed before any individual style rules in style element. It may come after other @import rules.