APA (7th ed.) Citation

Ederer, W. (1990). Publishers' International ISBN directory (17th Edition 1990/91.). K.G. Saur [etc.].

Chicago Style (17th ed.) Citation

Ederer, Walter. Publishers' International ISBN Directory. 17th Edition 1990/91. München [etc.]: K.G. Saur [etc.], 1990.

MLA (9th ed.) Citation

Ederer, Walter. Publishers' International ISBN Directory. 17th Edition 1990/91. K.G. Saur [etc.], 1990.