if you are just checking the torque on the bolts then the end torque spec is 19.6 - 23.52 N.m (2.0 - 2.3 kgf-m) plus 90° which should wind up being around 68.6 N.m

If you are installing new bolts or a new head then there is a sequence and method you have to use when installing a new head.
Use new bolts!

There is a tightening and breakin torque, return to 0, then final torque

step1 = 19.6 - 23.52 N.m (2.0 - 2.3 kgf-m)
step2 = 68.6 N.m (7.0 kgf-m)
step3 = 0.0
step4 = 19.6 - 23.52 N.m (2.0 - 2.3 kgf-m)
step5 = 90° - 92°

perform step 1, through all bolts
then do step 2 and run engine till hot.
let engine cool down
do step 3
then step 4 and 5

as for the tightening pattern you start in the middle bolts then work your way out using a cross hatch pattern for the next set, then the outside bolts reverse the cross hatch pattern.

If you contact me via the email address in my signature i can send you the diagram for this proceedure if you are unsure.