Formatted Citation

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APA

Ampian, S. G., Virta, R. L., & United States. (1992). Crystalline silica overview: Occurrence and analysis. Washington, D.C: U.S. Dept. of the Interior, Bureau of Mines.

MLA

Ampian, Sarkis G, and Robert L. Virta. Crystalline Silica Overview: Occurrence and Analysis. Washington, D.C: U.S. Dept. of the Interior, Bureau of Mines, 1992. Print.

CHICAGO

Ampian, Sarkis G., and Robert L. Virta. 1992. Crystalline silica overview occurrence and analysis. Washington, D.C.: U.S. Dept. of the Interior, Bureau of Mines.

HARVARD

AMPIAN, S. G., & VIRTA, R. L. (1992). Crystalline silica overview occurrence and analysis. Washington, D.C., U.S. Dept. of the Interior, Bureau of Mines.

TURABIAN

Ampian, Sarkis G., and Robert L. Virta. Crystalline Silica Overview Occurrence and Analysis. Washington, D.C.: U.S. Dept. of the Interior, Bureau of Mines, 1992.