APA (7th ed.) Citation

Wilberg, P., & Lewis, M. Business English: An individualised learning programme. Klett.

Chicago Style (17th ed.) Citation

Wilberg, Peter, and Michael Lewis. Business English: An Individualised Learning Programme. Stuttgart: Klett.

MLA (9th ed.) Citation

Wilberg, Peter, and Michael Lewis. Business English: An Individualised Learning Programme. Klett.

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