APA
Lawrance C., . (1977). Use of punched cards in the storage and retrieval of engineering information in Ethiopia. Crowthorne: Transport and Road Research Laboratory. Suppl. report nr 248.
Chicago
Lawrance CJ, . 1977. Use of punched cards in the storage and retrieval of engineering information in Ethiopia. Crowthorne: Transport and Road Research Laboratory. Suppl. report nr 248.
Harvard
Lawrance C., . (1977). Use of punched cards in the storage and retrieval of engineering information in Ethiopia. Crowthorne: Transport and Road Research Laboratory. Suppl. report nr 248.
MLA
Lawrance CJ, . Use of punched cards in the storage and retrieval of engineering information in Ethiopia. Crowthorne: Transport and Road Research Laboratory. Suppl. report nr 248. 1977.