APA استشهاد

Ratandeep Singh. (2003). National ecotourism & wildlife tourism policies and guide lines.

استشهاد بنمط شيكاغو

Ratandeep Singh. National Ecotourism & Wildlife Tourism Policies and Guide Lines. Newdelhi, Kanishka Publishers, 2003.

MLA استشهاد

Ratandeep Singh. National Ecotourism & Wildlife Tourism Policies and Guide Lines. 2003.