Gaya APA
Sergeant, E., Perkins, N. (2015).
Epidemiology for Field Veterinarians An Introduction .
London, UK:
Silke Hecht.
Gaya MLA
Sergeant, Evan., Perkins, Nigel.
"Epidemiology for Field Veterinarians An Introduction".
London, UK:
Silke Hecht,
2015.
e-book.