A convenient method of calculation has been developed to determine the cluster spectroscopic factors for the ejection of excited and complex fragments {'He, Li, 'Li, 'Be, etc. ) from the low-lying levels of the p-shell nuclei followed by transition both to the states of the lowest shell configuration of the daughter nucleus and to its hole states. The method can be used to analyze the cluster knock-out, transfer reactions induced by heavy ions, etc. NUCLEAB STRUCTURE p-shell nuclei; calculated cluster spectroscopic factors. Harmonic oscillator shell model.