Zenger, M., & Schäfert, R. (2014). Validation of the Patient-Doctor-Relationship Questionnaire (PDRQ-9) in a representative cross-sectional German population survey. PLOS ONE, 9(3), . https://doi.org/10.1371/journal.pone.0091964
Chicago Style (17th ed.) CitationZenger, Markus, and Rainer Schäfert. "Validation of the Patient-Doctor-Relationship Questionnaire (PDRQ-9) in a Representative Cross-sectional German Population Survey." PLOS ONE 9, no. 3 (2014). https://doi.org/10.1371/journal.pone.0091964.
MLA (9th ed.) CitationZenger, Markus, and Rainer Schäfert. "Validation of the Patient-Doctor-Relationship Questionnaire (PDRQ-9) in a Representative Cross-sectional German Population Survey." PLOS ONE, vol. 9, no. 3, 2014, https://doi.org/10.1371/journal.pone.0091964.