Stata Corporation. (1999). Stata reference manual: Release 6. Stata Corporation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रStata Corporation. Stata Reference Manual: Release 6. College Station, Tex: Stata Corporation, 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रStata Corporation. Stata Reference Manual: Release 6. Stata Corporation, 1999.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.