APA (7th ed.) Citation

Portsmouth, J. I. (1978). Practical poultry keeping (7th ed.). Spur Publications.

Chicago Style (17th ed.) Citation

Portsmouth, J. I. Practical Poultry Keeping. 7th ed. [Liss]: Spur Publications, 1978.

MLA (9th ed.) Citation

Portsmouth, J. I. Practical Poultry Keeping. 7th ed. Spur Publications, 1978.