e-Source: Chapter 4 'Concepts in Sample Surveys' by Sarah M. Nusser and Michael D. Larsen
www.esourceresearch.org

e-Source: Chapter 5 'Principles of Social Survey Data Collection' by Stephen Woodland
www.esourceresearch.org

StatPac– Survey and questionnaire design
www.statpac.com/surveys

Questionnaire Design and Analysis
www.tardis.ed.ac.uk/~kate/qmcweb/qcont.htm

Observation: some examples
http://www.readingrecovery.org/reading_recovery/accountability/observation/

Super Survey Knowledge Base
http://knowledge-base.supersurvey.com/glossary.htm#survey_problem

Leeds University Guide to the Design of Questionnaires
http://iss.leeds.ac.uk/info/312/surveys/217/guide_to_the_design_of_questionnaires

Creative Research System – Survey Design
www.surveysystem.com/sdesign.htm

(Structured) Observation
www.grahamtall.co.uk/Observation.htm