APA aipamena

Feveile, H., Olsen, O., & Hogh, A. (2007). A randomized trial of mailed questionnaires versus telephone interviews: Response patterns in a survey. BioMed Central.

Chicago Style aipamena

Feveile, Helene, Ole Olsen, and Annie Hogh. A Randomized Trial of Mailed Questionnaires Versus Telephone Interviews: Response Patterns in a Survey. BioMed Central, 2007.

MLA aipamena

Feveile, Helene, Ole Olsen, and Annie Hogh. A Randomized Trial of Mailed Questionnaires Versus Telephone Interviews: Response Patterns in a Survey. BioMed Central, 2007.