PERLMAN, H. H. Social Casework: A problem-solving process. The University of Chicago Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPERLMAN, Helen Harris. Social Casework: A Problem-solving Process. The University of Chicago Press.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPERLMAN, Helen Harris. Social Casework: A Problem-solving Process. The University of Chicago Press.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.