APA (7th ed.) Citation

Culligan, B. A. Evaluating corpora with word lists and word difficulty. Castledown Publishers.

Chicago Style (17th ed.) Citation

Culligan, Brent A. Evaluating Corpora with Word Lists and Word Difficulty. Castledown Publishers.

MLA (9th ed.) Citation

Culligan, Brent A. Evaluating Corpora with Word Lists and Word Difficulty. Castledown Publishers.

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