The same way you construct any truth table: one piece at a time. You only have two variables, which means you'll only need 4 rows. How did you start out?
This is how I'd do it.
Sorry I don't know how to do tables in LaTeX so I did it in paint, hope it's alright. I attached the file.
Note the last 2 rows, they are vacuously true since p is F.
Hope that helps... if you can any problems feel free to ask and I'll try explain.