Cita APA (7a ed.)

Hedrick, U. P. (1950). The history of horticulture in America to 1860. Oxford University Press.

Cita Chicago Style (17a ed.)

Hedrick, U. P. The History of Horticulture in America to 1860. New york: Oxford University Press, 1950.

Cita MLA (8a ed.)

Hedrick, U. P. The History of Horticulture in America to 1860. Oxford University Press, 1950.