i'm using react js for my project and i needed to use bootstrap in some pages of my application , so i put the     <link rel="stylesheet" href="https://netdna.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" />
in the Public folder in index.html 
but that apply the bootsrap in all pages ..fontFamily has been changed in pages .. 
i want to apply it for a specific react js file
how can i import     <link rel="stylesheet" href="https://netdna.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" />
 in a react js file please ? 
thanks for your help .
 
    