APA (7th ed.) Citation

(1970). Purnell's concise encyclopedia in colour. Purnell & Sons Limited.

Chicago Style (17th ed.) Citation

Purnell's Concise Encyclopedia in Colour. London: Purnell & Sons Limited, 1970.

MLA (9th ed.) Citation

Purnell's Concise Encyclopedia in Colour. Purnell & Sons Limited, 1970.

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