Armitage, Allan M. (1995) Speciality Cut Flowers: The Production of Annuals, Perennials, Bulbs and Woody Plants for Fresh and Dried Cut Flowers. Portland, Timber Press, null
Armitage, Allan M. (1994) Ornamental Bedding Plants. CAB International, null
Brickel, C. (ed.) (2002) The Royal Horticultural Society Encyclopedia of Gardening. London, Dorling Kinsersley, null
Secundária
Brickell C. & D. Joyce. (2003) The Royal Horticultural Society: Pruning and Training. London, Dorling Kindersley, null
Dirr M. A. (1997) Dirr's Hardy Trees and Shrubs: An Illustrated Encyclopedia. Portland, USA,Timber Press, null
Brown G. E. (1995) The Pruning of Trees, Shrubs and Conifers. Portland, USA, Timber Press, null
Larson, R.A. (ed.) (1992) Introduction to Floriculture, New York, Academic Press, null