APA (7th ed.) Citation

Knuth, D. E. (1979). TEX and METAFONT: New directions in typesetting. Digital Pr.

Chicago Style (17th ed.) Citation

Knuth, Donald Ervin. TEX and METAFONT: New Directions in Typesetting. Bedford, Mass: Digital Pr, 1979.

MLA (9th ed.) Citation

Knuth, Donald Ervin. TEX and METAFONT: New Directions in Typesetting. Digital Pr, 1979.