APA

Mensa-Graham W., Krepp T., Stephen I., Krepp T. & Stephen I.Dual-torque conept enhances PDC-BIT efficiency in directional and horizontal-drilling programs. : .

Chicago

Mensa-Graham Wilmot, Krepp Tony, Stephen Ita, Krepp Tony and Stephen Ita.Dual-torque conept enhances PDC-BIT efficiency in directional and horizontal-drilling programs. : .

Harvard

Mensa-Graham W., Krepp T., Stephen I., Krepp T. and Stephen I.Dual-torque conept enhances PDC-BIT efficiency in directional and horizontal-drilling programs. : .

MLA

Mensa-Graham Wilmot, Krepp Tony, Stephen Ita, Krepp Tony and Stephen Ita.: . .