Ryan, R., & Lefberg, I. (1987). Persons of disability in Washington State: A statistical profile, 1970-1980. Labor Market and Economic Analysis Branch, Washington State Employment Security Dept..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRyan, Rosemary, और Irv Lefberg. Persons of Disability in Washington State: A Statistical Profile, 1970-1980. Olympia, Wash. (212 Maple Park, Olympia 98504-5311): Labor Market and Economic Analysis Branch, Washington State Employment Security Dept., 1987.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRyan, Rosemary, और Irv Lefberg. Persons of Disability in Washington State: A Statistical Profile, 1970-1980. Labor Market and Economic Analysis Branch, Washington State Employment Security Dept., 1987.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.