APA সাইটেশন

B. Lang Jeffrey. (1994). The American express guide to corporate travel management (In lần thứ 1.). American: Amacom.

শিকাগো স্টাইলে সাইটেশন

B. Lang Jeffrey. The American Express Guide to Corporate Travel Management. In lần thứ 1. American: Amacom, 1994.

এমএলএ সাইটেশন

B. Lang Jeffrey. The American Express Guide to Corporate Travel Management. In lần thứ 1. American: Amacom, 1994.