Παραπομπή APA

Bhavani Sankar, V., Krishnamohan, K., & Nanditha Krishna. (1999). Bharathathinte paristhithika prasnangal: Oru aamugham.

Παραπομπή Chicago Style

Bhavani Sankar, V., K. Krishnamohan, και Nanditha Krishna. Bharathathinte Paristhithika Prasnangal: Oru Aamugham. Chennai, C P Ramaswami Environment Centre, 1999.

Παραπομπή MLA

Bhavani Sankar, V., et al. Bharathathinte Paristhithika Prasnangal: Oru Aamugham. 1999.