MLA

Loudon, J. C. Encyclopaedia of Gardening; Comprising the Theory and Practice of Horticulture, Floriculture, Arboriculture, and Landscape-gardening, Including All the Latest Improvements; a General History of Gardening In All Countries; and a Statistical View of Its Present State, with Suggestions for Its Future Progress, In the British Isles. London: Longman, Hurst, Rees, Orme, and Brown, 1822.

APA

Loudon, J. C. (1822). Encyclopaedia of gardening; comprising the theory and practice of horticulture, floriculture, arboriculture, and landscape-gardening, including all the latest improvements; a general history of gardening in all countries; and a statistical view of its present state, with suggestions for its future progress, in the British Isles. London: Longman, Hurst, Rees, Orme, and Brown.

Chicago

Loudon, J. C. Encyclopaedia of Gardening; Comprising the Theory and Practice of Horticulture, Floriculture, Arboriculture, and Landscape-Gardening, Including All the Latest Improvements; a General History of Gardening In All Countries; and a Statistical View of Its Present State, with Suggestions for Its Future Progress, In the British Isles. London: Longman, Hurst, Rees, Orme, and Brown, 1822.