APA
Douglas S., W, Williamson H. & D. (19630000). Principles of veterinary radiography. Baltimore, us: The Williams y Wilkins.
Chicago
Douglas S, W, Williamson H and D. 19630000. Principles of veterinary radiography. Baltimore, us: The Williams y Wilkins.
Harvard
Douglas S., W, Williamson H. and D. (19630000). Principles of veterinary radiography. Baltimore, us: The Williams y Wilkins.
MLA
Douglas S, W, Williamson H and D. Principles of veterinary radiography. Baltimore, us: The Williams y Wilkins. 19630000.