APA (7th ed.) Citation

Walla, D. (1989). Best airline: An overview of United Airline's newest strategy for improving customer service. [publisher not identified].

Chicago Style (17th ed.) Citation

Walla, Donna. Best Airline: An Overview of United Airline's Newest Strategy for Improving Customer Service. [Place of publication not identified]: [publisher not identified], 1989.

MLA (9th ed.) Citation

Walla, Donna. Best Airline: An Overview of United Airline's Newest Strategy for Improving Customer Service. [publisher not identified], 1989.