APA (7th ed.) Citation

Biswas, S. B., & Biswas, A. (1993). An Introduction to Viruses (4th rev. ed.). Vikas Publishing House Pvt. Ltd..

Chicago Style (17th ed.) Citation

Biswas, S. B., and Amita Biswas. An Introduction to Viruses. 4th rev. ed. New Delhi: Vikas Publishing House Pvt. Ltd., 1993.

MLA (9th ed.) Citation

Biswas, S. B., and Amita Biswas. An Introduction to Viruses. 4th rev. ed. Vikas Publishing House Pvt. Ltd., 1993.