APA (7th ed.) Citation

Semancik, J. S. (1987). Viroids and viroid-like pathogens. CRC Press.

Chicago Style (17th ed.) Citation

Semancik, Joseph S. Viroids and Viroid-like Pathogens. Boca Raton, Fla.: CRC Press, 1987.

MLA (9th ed.) Citation

Semancik, Joseph S. Viroids and Viroid-like Pathogens. CRC Press, 1987.