APA (7th ed.) Citation

International ISBN Agency. (1989). Publishers' international ISBN directory. K.G. Saur ; R.R. Bowker.

Chicago Style (17th ed.) Citation

International ISBN Agency. Publishers' International ISBN Directory. München : New York: K.G. Saur ; R.R. Bowker, 1989.

MLA (9th ed.) Citation

International ISBN Agency. Publishers' International ISBN Directory. K.G. Saur ; R.R. Bowker, 1989.

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