APA (7th ed.) Citation

Ellis, R. (1993). Naturally Simplified Input, Comprehension, and Second Language Acquisition.

Chicago Style (17th ed.) Citation

Ellis, Rod. Naturally Simplified Input, Comprehension, and Second Language Acquisition. 1993.

MLA (9th ed.) Citation

Ellis, Rod. Naturally Simplified Input, Comprehension, and Second Language Acquisition. 1993.

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