Anthracite Institute. The formation and characteristics of Pennsylvania anthracite. The Anthracite Institute.
Chicago Style (17th ed.) CitationAnthracite Institute. The Formation and Characteristics of Pennsylvania Anthracite. New York: The Anthracite Institute.
MLA (8th ed.) CitationAnthracite Institute. The Formation and Characteristics of Pennsylvania Anthracite. The Anthracite Institute.
Warning: These citations may not always be 100% accurate.