(1953). Alphab. Tabelliermaschine Type 420. IBM.
Chicago Style (17th ed.) CitationAlphab. Tabelliermaschine Type 420. [Stuttgart]: IBM, 1953.
MLA (9th ed.) CitationAlphab. Tabelliermaschine Type 420. IBM, 1953.
Warning: These citations may not always be 100% accurate.