APA (7th ed.) Citation

Seiferas, J., & Vitányi, P. M. (1984). Counting is easy (Preliminary version.).

Chicago Style (17th ed.) Citation

Seiferas, Joel, and Paul M. Vitányi. Counting Is Easy. Preliminary version. Amsterdam, 1984.

MLA (9th ed.) Citation

Seiferas, Joel, and Paul M. Vitányi. Counting Is Easy. Preliminary version. 1984.