APA

Brickell C., The Royal Horticultural Society (London), . (1992). Encyclopedia of Gardening. London: Dorling Kindersley.

Chicago

Brickell Christopher, The Royal Horticultural Society (London), . 1992. Encyclopedia of Gardening. London: Dorling Kindersley.

Harvard

Brickell C., The Royal Horticultural Society (London), . (1992). Encyclopedia of Gardening. London: Dorling Kindersley.

MLA

Brickell Christopher, The Royal Horticultural Society (London), . Encyclopedia of Gardening. London: Dorling Kindersley. 1992.