Some fans turned on Ferguson after the Manchester derby defeat at Old Trafford on Tuesday over his part in appointing Moyes.
The Scot insisted Ferguson's faith and support are key factors in why he will survive the crisis.
He said: "The people who appointed me are incredibly knowledgeable football people - in fact, it was probably the most knowledgeable person who gave me the job.
"They saw somebody who could do the job at Manchester United and know what the club is about and the style of the job so you have to trust those people. They trust me and for that reason we'll go on working together.
"I have continued with the philosophy and style that I believe I work in and that I believe Manchester United work in. I came here with a long-term job, not a short-term one."
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