APA (7th ed.) Citation

Leitner, H. H. (1988). A knowledge representation formalism for human-oriented computer systems. University Microfilms International.

Chicago Style (17th ed.) Citation

Leitner, Henry Haskel. A Knowledge Representation Formalism for Human-oriented Computer Systems. Ann Arbor: University Microfilms International, 1988.

MLA (9th ed.) Citation

Leitner, Henry Haskel. A Knowledge Representation Formalism for Human-oriented Computer Systems. University Microfilms International, 1988.