Doyle, T. W., & Clark, J. I. (1991). Dr. Pascal tutorial manual. D.C. Heath.
Chicago Style aipamenaDoyle, Thomas W., and Jeremy I. Clark. Dr. Pascal Tutorial Manual. Lexington, Mass: D.C. Heath, 1991.
MLA aipamenaDoyle, Thomas W., and Jeremy I. Clark. Dr. Pascal Tutorial Manual. D.C. Heath, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.