APA (7th ed.) Citation

Krishan Kumar. (1988). Theory of classification (4th rev. ed.). Vikas Publishing House.

Chicago Style (17th ed.) Citation

Krishan Kumar. Theory of Classification. 4th rev. ed. New Delhi: Vikas Publishing House, 1988.

MLA (9th ed.) Citation

Krishan Kumar. Theory of Classification. 4th rev. ed. Vikas Publishing House, 1988.