Gaya APA
Epidemiology, D, U, P, , P, O, V.
(2002).
Veterinary Epidemiology - An Introduction
.
London:
.
Gaya MLA
Epidemiology, Dirk, U., Pfeiffer, , Professor, Of, Veterinary.
"Veterinary Epidemiology - An Introduction".
London:
,
2002.
e-book.