APA استشهاد

Singh, R. (2004). National ecotourism & wildlife tourism. Kanishka publishers.

استشهاد بنمط شيكاغو

Singh, Ratandeep. National Ecotourism & Wildlife Tourism. NewDelhi: Kanishka publishers, 2004.

MLA استشهاد

Singh, Ratandeep. National Ecotourism & Wildlife Tourism. Kanishka publishers, 2004.