APA (7th ed.) Citation

North, B. (2000). The development of a common framework scale of language proficiency. Peter Lang.

Chicago Style (17th ed.) Citation

North, Brian. The Development of a Common Framework Scale of Language Proficiency. New York: Peter Lang, 2000.

MLA (9th ed.) Citation

North, Brian. The Development of a Common Framework Scale of Language Proficiency. Peter Lang, 2000.

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