APA (7th ed.) Citation

Reader's Digest Association (Great Britain) & Hay, R. (1971). Reader's Digest encyclopaedia of garden plants and flowers: [Roy Hay, consultant editor]. Reader's Digest Association.

Chicago Style (17th ed.) Citation

Reader's Digest Association (Great Britain) and Roy Hay. Reader's Digest Encyclopaedia of Garden Plants and Flowers: [Roy Hay, Consultant Editor]. London: Reader's Digest Association, 1971.

MLA (9th ed.) Citation

Reader's Digest Association (Great Britain) and Roy Hay. Reader's Digest Encyclopaedia of Garden Plants and Flowers: [Roy Hay, Consultant Editor]. Reader's Digest Association, 1971.