Não informado. (1981). Soviet Engineering Research. Production Engineering Research Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Soviet Engineering Research. Melton Mowbray, Inglaterra: Production Engineering Research Association, 1981.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Soviet Engineering Research. Production Engineering Research Association, 1981.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.