Direct tax bulletin. Vol.21, 1983. Nirikshan Nideshalaya.
Chicago Style aipamenaDirect Tax Bulletin. Vol.21, 1983. New Delhi: Nirikshan Nideshalaya.
MLA aipamenaDirect Tax Bulletin. Vol.21, 1983. Nirikshan Nideshalaya.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.