User-agent: Googlebot 
Crawl-delay: 30
Disallow:

User-agent: googlebot-image
Crawl-delay: 30
Disallow:

User-agent: googlebot-mobile
Crawl-delay: 30
Disallow:

User-Agent: Mediapartners-Google
Crawl-delay: 30
Disallow:

User-Agent: Adsbot-Google
Crawl-delay: 30
Disallow:

User-agent: MSNBot
Crawl-delay: 30
Disallow:

User-agent: MSNBot-Media
Crawl-delay: 30
Disallow:

User-agent: AdIdxBot
Crawl-delay: 30
Disallow:

User-agent: BingPreview
Crawl-delay: 30
Disallow:

User-agent: bingbot
Crawl-delay: 30
Disallow:

User-agent: Slurp
Crawl-delay: 30
Disallow: