Παραπομπή APA

Veena. (1986). Bio-gas technology: A study of community bio-gas plant. Ashish Publishing House.

Παραπομπή Chicago Style

Veena. Bio-gas Technology: A Study of Community Bio-gas Plant. New Delhi: Ashish Publishing House, 1986.

Παραπομπή MLA

Veena. Bio-gas Technology: A Study of Community Bio-gas Plant. Ashish Publishing House, 1986.