V., M., L., Lee, C., C.(1990).Introduction to palnt disease epidemiology / C. Lee Campbell, Laurence V. Madden .:John Wiley n Sons.
Gaya MLA
Madden, Laurence, V.., Campbell, C., Lee."Introduction to palnt disease epidemiology / C. Lee Campbell, Laurence V. Madden".:John Wiley n Sons,1990.Textbook.