Here's a great resource from ADM in Germany - to support those working in our industry: https://www.adm-ev.de/en/standards-guidelines/#anker2
- Guideline on the Handling of Addresses in Market and Social Research
- Guideline on Online Surveys
- Guideline for Studies in Public Health Service for Purposes of Market and Social Research
- Guideline on Recordings and Observations in Market and Social Research
- Guideline on Telephone Surveys
- Guideline on Interviewing Minors
- Guideline on Surveys within and using Social Media (Social Media Guideline)
- Guideline on the Handling of Databases in Market and Social Research