First, the courts have no jurisdiction with respect to parliamentary committees, and no court would make an order against a parliamentary committee. That's in response to the earlier member's comments.
On the point about the House versus committees, if I understand the witness correctly, what Marleau and Montpetit or other texts may be saying is that the committee can't punish for contempt, so the summons or a directive to produce information by a committee is not punishable by the committee. They have to report to the House, and it's the House, then, that could visit punishment upon a person if the House agrees that constitutes contempt. But the order for production of information has its origins in the committee, and that's the order to which persons are obliged to respond, failing which it could be the subject of a contempt proceeding in the House.