Copeland, R. M. (1867). Country life: A handbook of agriculture, horticulture, and landscape gardening (6th ed.). O. Judd and company.
Chicago-referens (17:e uppl.)Copeland, Robert Morris. Country Life: A Handbook of Agriculture, Horticulture, and Landscape Gardening. 6th ed. New York: O. Judd and company, 1867.
MLA-referens (8:e uppl.)Copeland, Robert Morris. Country Life: A Handbook of Agriculture, Horticulture, and Landscape Gardening. 6th ed. O. Judd and company, 1867.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.