Hehner, E. C. R. A. (1984). The logic of programming.
Chicago Style aipamenaHehner, Eric C R; Author. The Logic of Programming. New Delhi, Prentice-Hall of India, 1984.
MLA aipamenaHehner, Eric C R; Author. The Logic of Programming. 1984.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.