What is the usual method for swearing an oath/making an affidavit?

The normal method for the individual swearing an oath or making an affidavit is to hold the Bible or other appropriate holy book and say aloud:

“I swear by Almighty God that this is my name and handwriting and that the contents of this affidavit are true (if there are exhibits add: and that these are the exhibit/s referred to).”

Variation of this wording may be preferred by followers of religions other than Christianity or Judaism.