The Royal Horticultural Society encyclopedia of gardening

MLA

Brickell, Christopher. The Royal Horticultural Society Encyclopedia of Gardening. Fourth edition. London: Dorling Kindersley, 2012.

APA

Brickell, C. (2012). The Royal Horticultural Society encyclopedia of gardening. Fourth edition. London: Dorling Kindersley.

Chicago

Brickell, Christopher. The Royal Horticultural Society Encyclopedia of Gardening. Fourth edition. London: Dorling Kindersley, 2012.