Παραπομπή σε μορφή APA (7η εκδ.)
ebrary, Inc, Symposium on Technology and Economics, & Landau, R. (1991). Technology & economics: Papers commemorating Ralph Landau's service to the National Academy of Engineering. National Academy Press.
Παραπομπή σε μορφή Chicago (17η εκδ.)
ebrary, Inc, Symposium on Technology and Economics, και Ralph Landau. Technology & Economics: Papers Commemorating Ralph Landau's Service to the National Academy of Engineering. Washington, D.C.: National Academy Press, 1991.
Παραπομπή σε μορφή MLA (9th εκδ.)
ebrary, Inc, et al. Technology & Economics: Papers Commemorating Ralph Landau's Service to the National Academy of Engineering. National Academy Press, 1991.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.