APA (7th ed.) Citation

National Pig Breeders' Association, London. Herd book. [publisher not identified].

Chicago Style (17th ed.) Citation

National Pig Breeders' Association, London. Herd Book. London: [publisher not identified].

MLA (9th ed.) Citation

National Pig Breeders' Association, London. Herd Book. [publisher not identified].

Warning: These citations may not always be 100% accurate.