Generally, the rule "may be complied with by receiving evidence, testimony, a proffer of evidence, statements by counsel or the defendant, or reference to the record sufficient to satisfy the court that there is evidence to convict on each element of the charge." Williams v. State, 534 So.2d 929, 930 (Fla. 4th DCA 1988). If, however, the court fails to make a complete inquiry or to receive a complete proffer, its failure will not generally result in reversal without a corresponding showing of prejudice. Id. The trial court below denied appellant's post-conviction motions without a hearing and referred to his plea, waiver and consent form, and the plea and sentence transcript.