APA (7th ed.) Citation

Smith, K. M. (1968). Plant viruses (4. ed.). Methuen.

Chicago Style (17th ed.) Citation

Smith, Kenneth M. Plant Viruses. 4. ed. London: Methuen, 1968.

MLA (9th ed.) Citation

Smith, Kenneth M. Plant Viruses. 4. ed. Methuen, 1968.