APA

Greenberg J., . (2009). Innovative, application-specific drill bit designs prove value, help operators set drilling records. : .

Chicago

Greenberg Jerry, . 2009. Innovative, application-specific drill bit designs prove value, help operators set drilling records. : .

Harvard

Greenberg J., . (2009). Innovative, application-specific drill bit designs prove value, help operators set drilling records. : .

MLA

Greenberg Jerry, . Innovative, application-specific drill bit designs prove value, help operators set drilling records. : . 2009.