APA (7th ed.) Citation

Gross, M., & Lentin, A. (1970). Introduction to formal grammars. Allen & Unwin.

Chicago Style (17th ed.) Citation

Gross, Maurice, and Andre Lentin. Introduction to Formal Grammars. London: Allen & Unwin, 1970.

MLA (8th ed.) Citation

Gross, Maurice, and Andre Lentin. Introduction to Formal Grammars. Allen & Unwin, 1970.

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