MLA

Loudon, J. C. Encyclopaedia of Gardening ; Comprising the Theory and Practice of Horticulture, Floriculture, Arboriculture, and Landscape-gardening, Including All the Latest Improvements; Etc. London: Longman, Rees, Orme, Brown, Green and Longman, 1835.

APA

Loudon, J. C. (1835). Encyclopaedia of gardening ; comprising the theory and practice of horticulture, floriculture, arboriculture, and landscape-gardening, including all the latest improvements; etc. London: Longman, Rees, Orme, Brown, Green and Longman.

Chicago

Loudon, J. C. Encyclopaedia of Gardening ; Comprising the Theory and Practice of Horticulture, Floriculture, Arboriculture, and Landscape-Gardening, Including All the Latest Improvements; Etc.. London: Longman, Rees, Orme, Brown, Green and Longman, 1835.