APA (7th ed.) Citation

Barratt, M., Ferris, J., & Lenton, S. (2014). Hidden Populations, Online Purposive Sampling, and External Validity: Taking off the Blindfold. Sage Publications.

Chicago Style (17th ed.) Citation

Barratt, Monica, J. Ferris, and Simon Lenton. Hidden Populations, Online Purposive Sampling, and External Validity: Taking off the Blindfold. Sage Publications, 2014.

MLA (9th ed.) Citation

Barratt, Monica, et al. Hidden Populations, Online Purposive Sampling, and External Validity: Taking off the Blindfold. Sage Publications, 2014.