Παραπομπή APA

Sidhu, S. S. (1994). Aviation and sustainable tourism: Emerging trends. Har-Anand Publications.

Παραπομπή Chicago Style

Sidhu, S. S. Aviation and Sustainable Tourism: Emerging Trends. New Delhi: Har-Anand Publications, 1994.

Παραπομπή MLA

Sidhu, S. S. Aviation and Sustainable Tourism: Emerging Trends. Har-Anand Publications, 1994.