APA (7th ed.) Citation

Ritchie, G. D. (1990). Languages generated by two-level morphological rules.

Chicago Style (17th ed.) Citation

Ritchie, Graeme D. Languages Generated by Two-level Morphological Rules. Edinburgh, 1990.

MLA (9th ed.) Citation

Ritchie, Graeme D. Languages Generated by Two-level Morphological Rules. 1990.

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