Gaya APA
Leonard, J, F., Deborah, A, N. (1997).
Exercises in Plant Disease Epidemiology .
U.S.A:
The American Phytopathological Society.
Gaya MLA
Leonard, J., Francl,., Deborah, A., Neher,.
"Exercises in Plant Disease Epidemiology".
U.S.A:
The American Phytopathological Society,
1997.
Text.