ebrary, Inc, & Edgerton, W. W. (2008). Recommended contract practices for underground construction. Society for Mining, Metallurgy, and Exploration.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रebrary, Inc, और William W. Edgerton. Recommended Contract Practices for Underground Construction. Littleton, Colo.: Society for Mining, Metallurgy, and Exploration, 2008.
एमएलए (9वां संस्करण) प्रशस्ति पत्रebrary, Inc, और William W. Edgerton. Recommended Contract Practices for Underground Construction. Society for Mining, Metallurgy, and Exploration, 2008.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.