Gaya APA

Chironis, N, P. (1977). Coal Age Operating Handbook of Underground Mining, Volume 1- Coal Age Library of Operating Handbook . New York: McGraw-Hill Inc..

Gaya MLA

Chironis, Nicholas,, P. "Coal Age Operating Handbook of Underground Mining, Volume 1- Coal Age Library of Operating Handbook". New York: McGraw-Hill Inc., 1977. Text.