APA ציטוט

(1980). Pumice and volcanic cinder in ... / U.S. Department of the Interior, Bureau of Mines.

Chicago Style (17th ed.) Citation

Pumice and Volcanic Cinder in ... / U.S. Department of the Interior, Bureau of Mines. 1980.

ציטוט MLA

Pumice and Volcanic Cinder in ... / U.S. Department of the Interior, Bureau of Mines. 1980.