If you need your mother and sister to come why dont you try the Airport Visa, which is much easier and faster for which you need a valid Residence Permit.
If you have a residence Permit then you can bring your mother and sister.
Carry the passport copies of your mother and sister and your passport copies with the valid RP page.
Then you need to fill in a form for both your mother and sister separately and attach the respective passport copies along with your passport copy and pay the required fees.
If its for 2 or 3 months airport visa should suffice.
Try the counter at the Exit Permit section of the Doha Airport.
If you need any further clarifications please feel free in getting in touch with me.
If you need your mother and sister to come why dont you try the Airport Visa, which is much easier and faster for which you need a valid Residence Permit.
If you have a residence Permit then you can bring your mother and sister.
Carry the passport copies of your mother and sister and your passport copies with the valid RP page.
Then you need to fill in a form for both your mother and sister separately and attach the respective passport copies along with your passport copy and pay the required fees.
If its for 2 or 3 months airport visa should suffice.
Try the counter at the Exit Permit section of the Doha Airport.
If you need any further clarifications please feel free in getting in touch with me.
Good luck & God Bless.