APA

Konar (B B) ;And Others, . (1997). Coal Preparation. : .

Chicago

Konar (B B) ;And Others, . 1997. Coal Preparation. : .

Harvard

Konar (B B) ;And Others, . (1997). Coal Preparation. : .

MLA

Konar (B B) ;And Others, . Coal Preparation. : . 1997.