APA (7th ed.) Citation

(1953). Alphab. Tabelliermaschine Type 420. IBM.

Chicago Style (17th ed.) Citation

Alphab. Tabelliermaschine Type 420. [Stuttgart]: IBM, 1953.

MLA (9th ed.) Citation

Alphab. Tabelliermaschine Type 420. IBM, 1953.

Warning: These citations may not always be 100% accurate.