Loudon, J. C. (1950). Encyclopaedia of Gardening: Comprising the theory and practice of horticulture, floriculture, arboriculture, and landscape-Gardening.. Longman.

Loudon, J. C. Encyclopaedia of Gardening: Comprising the Theory and Practice of Horticulture, Floriculture, Arboriculture, and Landscape-Gardening.. London: Longman, 1950.

Loudon, J. C. Encyclopaedia of Gardening: Comprising the Theory and Practice of Horticulture, Floriculture, Arboriculture, and Landscape-Gardening.. Longman, 1950.