Ayearst, L. E., Harsanyi, Z., & Michalko, K. J. The Pain and Sleep Questionnaire Three-Item Index (PSQ-3): A Reliable and Valid Measure of The Impact of Pain on Sleep in Chronic Nonmalignant Pain of Various Etiologies. Wiley.
Chicago Style (17th ed.) CitationAyearst, Lindsay E., Zoltan Harsanyi, and Kenneth J. Michalko. The Pain and Sleep Questionnaire Three-Item Index (PSQ-3): A Reliable and Valid Measure of The Impact of Pain on Sleep in Chronic Nonmalignant Pain of Various Etiologies. Wiley.
MLA (9th ed.) CitationAyearst, Lindsay E., et al. The Pain and Sleep Questionnaire Three-Item Index (PSQ-3): A Reliable and Valid Measure of The Impact of Pain on Sleep in Chronic Nonmalignant Pain of Various Etiologies. Wiley.
Warning: These citations may not always be 100% accurate.