Kevin Rudolf, Florian Lammer, Gerrit Stassen, Ingo Froböse, & Andrea Schaller. (2020). Show cards of the Global Physical Activity Questionnaire (GPAQ) - do they impact validity? A crossover study. BMC.
Chicago Style (17th ed.) CitationKevin Rudolf, Florian Lammer, Gerrit Stassen, Ingo Froböse, and Andrea Schaller. Show Cards of the Global Physical Activity Questionnaire (GPAQ) - Do They Impact Validity? A Crossover Study. BMC, 2020.
MLA (9th ed.) CitationKevin Rudolf, et al. Show Cards of the Global Physical Activity Questionnaire (GPAQ) - Do They Impact Validity? A Crossover Study. BMC, 2020.
Warning: These citations may not always be 100% accurate.