APA (7 वां संस्करण) प्रशस्ति पत्र
Hustrulid, W. A., & Bullock, R. L. (2001). Underground mining methods: Engineering fundamentals and international case studies. Society for Mining,Metallurgy and Exploration,SME.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Hustrulid, William A., और Richard L. Bullock. Underground Mining Methods: Engineering Fundamentals and International Case Studies. United States: Society for Mining,Metallurgy and Exploration,SME, 2001.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Hustrulid, William A., और Richard L. Bullock. Underground Mining Methods: Engineering Fundamentals and International Case Studies. Society for Mining,Metallurgy and Exploration,SME, 2001.
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