APA

Downey L., Hayduk L. A., Curtis J. R. & Engelberg R. A. (20171219). Measuring Depression-Severity in Critically Ill Patients' Families with the Patient Health Questionnaire (PHQ): Tests for Unidimensionality and Longitudinal Measurement Invariance, with Implications for CONSORT. : Journal of pain and symptom management.

Chicago

Downey Lois, Hayduk Leslie A, Curtis J Randall and Engelberg Ruth A. 20171219. Measuring Depression-Severity in Critically Ill Patients' Families with the Patient Health Questionnaire (PHQ): Tests for Unidimensionality and Longitudinal Measurement Invariance, with Implications for CONSORT. : Journal of pain and symptom management.

Harvard

Downey L., Hayduk L. A., Curtis J. R. and Engelberg R. A. (20171219). Measuring Depression-Severity in Critically Ill Patients' Families with the Patient Health Questionnaire (PHQ): Tests for Unidimensionality and Longitudinal Measurement Invariance, with Implications for CONSORT. : Journal of pain and symptom management.

MLA

Downey Lois, Hayduk Leslie A, Curtis J Randall and Engelberg Ruth A. Measuring Depression-Severity in Critically Ill Patients' Families with the Patient Health Questionnaire (PHQ): Tests for Unidimensionality and Longitudinal Measurement Invariance, with Implications for CONSORT. : Journal of pain and symptom management. 20171219.