APA (7th ed.) Citation

(1975). LANG-PAK, an interactive language design system / Lee E. Heindel, Jerry T. Roberto.

Chicago Style (17th ed.) Citation

LANG-PAK, an Interactive Language Design System / Lee E. Heindel, Jerry T. Roberto. 1975.

MLA (9th ed.) Citation

LANG-PAK, an Interactive Language Design System / Lee E. Heindel, Jerry T. Roberto. 1975.

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