APA
Perneger T. V., Courvoisier D. S., Hudelson P. M. & Gayet-Ageron A. (20150721). Sample size for pre-tests of questionnaires. : Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation.
Chicago
Perneger Thomas V, Courvoisier Delphine S, Hudelson Patricia M and Gayet-Ageron Angèle. 20150721. Sample size for pre-tests of questionnaires. : Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation.
Harvard
Perneger T. V., Courvoisier D. S., Hudelson P. M. and Gayet-Ageron A. (20150721). Sample size for pre-tests of questionnaires. : Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation.
MLA
Perneger Thomas V, Courvoisier Delphine S, Hudelson Patricia M and Gayet-Ageron Angèle. Sample size for pre-tests of questionnaires. : Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation. 20150721.