ebrary, Inc. (2008). Study guide for the professional licensure of mining and mineral processing engineers: Principles and practice of engineering (P.E.) examination (7th ed.). Society for Mining Metallurgy and Exploration.
Citace podle Chicago (17th ed.)ebrary, Inc. Study Guide for the Professional Licensure of Mining and Mineral Processing Engineers: Principles and Practice of Engineering (P.E.) Examination. 7th ed. Littleton: Society for Mining Metallurgy and Exploration, 2008.
Citace podle MLA (9th ed.)ebrary, Inc. Study Guide for the Professional Licensure of Mining and Mineral Processing Engineers: Principles and Practice of Engineering (P.E.) Examination. 7th ed. Society for Mining Metallurgy and Exploration, 2008.
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