National Institute of Agricultural Botany (Cambridge, Eng.). (1974). National scheme for comprehensive certification of herbage seeds: Standards ([Revised ed.].). N.I.A.B..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNational Institute of Agricultural Botany (Cambridge, Eng.). National Scheme for Comprehensive Certification of Herbage Seeds: Standards. [Revised ed.]. Cambridge: N.I.A.B., 1974.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNational Institute of Agricultural Botany (Cambridge, Eng.). National Scheme for Comprehensive Certification of Herbage Seeds: Standards. [Revised ed.]. N.I.A.B., 1974.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.