What is recipe for a citrus marinade for carne asada?

I used to live in So. Cali. and my favorite thing to eat was Carne Asada. I have moved to Oklahoma and everyone tries making it but fail miserably. I am looking for a recipe that incorporates oranges into the marinade which is how I remember it from home. Does anyone have any ideas? Please help! I am desperately trying to get that taste of home.