How to set Default CSS Settings for HTML <blockquote> Tag

Most browsers will display the <blockquote> element with the following default values:

index.html

Example: HTML

<style>
blockquote { display: block; margin-top: 1em; margin-bottom: 1em; margin-left: 40px; margin-right: 40px;
}
</style>
<blockquote cite="http://www.worldwildlife.org/who/index.html">
For 50 years, WWF has been protecting the future of nature. The world's leading conservation organization, WWF works in 100 countries and is supported by 1.2 million members in the United States and close to 5 million globally.
</blockquote>

Output should be:

Type :	html
Category :	Web Tutorial
Sub Category :	HTML Tag
Uploaded by :	Admin