APA (7th ed.) Citation

Kullmann-Lee, A. (1992). German for business. Hugo's Language Books.

Chicago Style (17th ed.) Citation

Kullmann-Lee, Astrid. German for Business. Woodbridge, Suffolk, Great Britain: Hugo's Language Books, 1992.

MLA (9th ed.) Citation

Kullmann-Lee, Astrid. German for Business. Hugo's Language Books, 1992.