APA (7th ed.) Citation

Keller, P., & Maas, T. (1990). An OPTRAN-generated front-end for Ada.

Chicago Style (17th ed.) Citation

Keller, Paul, and Thomas Maas. An OPTRAN-generated Front-end for Ada. Saarbrücken, 1990.

MLA (9th ed.) Citation

Keller, Paul, and Thomas Maas. An OPTRAN-generated Front-end for Ada. 1990.