APA (7th ed.) Citation

Pratley. (1957). All about budgerigars (3rd edition.). Pultry World.

Chicago Style (17th ed.) Citation

Pratley. All About Budgerigars. 3rd edition. London: Pultry World, 1957.

MLA (8th ed.) Citation

Pratley. All About Budgerigars. 3rd edition. Pultry World, 1957.

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