APA (7th ed.) Citation

(1961). 300 Years of the GPO. Stationery Office.

Chicago Style (17th ed.) Citation

300 Years of the GPO. [London]: Stationery Office, 1961.

MLA (9th ed.) Citation

300 Years of the GPO. Stationery Office, 1961.

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