@inbook{serow_hess_abt_ukpabi_1998, title={Evaluating a web-based course}, ISBN={0536010536}, booktitle={Program evaluation handbook}, publisher={Needham Heights, Mass.: Simon & Schuster Custom Publishing}, author={Serow, R. C. and Hess, G. R. and Abt, R. C. and Ukpabi, C. V.}, year={1998}, pages={57–60} }