APA (7th ed.) Citation

Levi, G., & Sirovich, F. (1973). Generalized and / or graphs and their relation to formal grammars.

Chicago Style (17th ed.) Citation

Levi, Giorgio, and Franco Sirovich. Generalized and / or Graphs and Their Relation to Formal Grammars. Pisa, 1973.

MLA (9th ed.) Citation

Levi, Giorgio, and Franco Sirovich. Generalized and / or Graphs and Their Relation to Formal Grammars. 1973.

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