Barron, David William. 2.1. Symbolic instructions. 写于University of Southampton, Southampton, UK. Floretin, J. John (编). Assemblers and Loaders. Computer Monographs 3. New York, USA: Elsevier North-Holland Inc. 1978: 7 [1971, 1969]. ISBN 0-444-19462-2. LCCN 78-19961. (xii+100 pages)