Παραπομπή APA

Batra, K. L. A. (1990). Problems and prospects of tourism.

Παραπομπή Chicago Style

Batra, K L; Author. Problems and Prospects of Tourism. Jaipur, Printwell, 1990.

Παραπομπή MLA

Batra, K L; Author. Problems and Prospects of Tourism. 1990.