LEHMAN, J. W., & REID, C. A. (1994, Januar 1). Knowledge-based searching with TOPIC®. (500215). Gaithersburg, MD: National Institute of Standards and Technology, 1994. Abgerufen von http://pascal-francis.inist.fr/vibad ndex.php?action=search&terms=3464817

LEHMAN, J. W und REID, C. A, 1994. Knowledge-based searching with TOPIC®. In: [online]. Gaithersburg, MD: National Institute of Standards and Technology, 1994. 1 Januar 1994. Available from: http://pascal-francis.inist.fr/vibad ndex.php?action=search&terms=3464817

LEHMAN, J. W., und C. A. REID. Knowledge-based searching with TOPIC®. Nr. 500215, Gaithersburg, MD: National Institute of Standards and Technology, 1994., 1994, http://pascal-francis.inist.fr/vibad ndex.php?action=search&terms=3464817.

LEHMAN, J.W. und REID, C.A. (1994), „Knowledge-based searching with TOPIC®“, in , Bd. , Gaithersburg, MD: National Institute of Standards and Technology, 1994., verfügbar unter: http://pascal-francis.inist.fr/vibad ndex.php?action=search&terms=3464817.