APA (7th ed.) Citation

Ketterer, M. (1982). How to manage a successful catering business. Hayden Book.

Chicago Style (17th ed.) Citation

Ketterer, Manfred. How to Manage a Successful Catering Business. Rochelle Park, NJ: Hayden Book, 1982.

MLA (9th ed.) Citation

Ketterer, Manfred. How to Manage a Successful Catering Business. Hayden Book, 1982.