Cita APA (7th ed.)

Scheffler, F. L. (1974). Optimization of retrieval techniques and file structures for the CIRCOL (Central Information Reference and Control On-line) system. s.n..

Cita Chicago (17th ed.)

Scheffler, F. L. Optimization of Retrieval Techniques and File Structures for the CIRCOL (Central Information Reference and Control On-line) System. [s.l.]: s.n., 1974.

Cita MLA (8th ed.)

Scheffler, F. L. Optimization of Retrieval Techniques and File Structures for the CIRCOL (Central Information Reference and Control On-line) System. s.n., 1974.