Gray, A. 1. (1872). Manual of the botany of the northern United States: Including the district east of the Mississippi and north of North Carolina and Tennessee, arranged according to the natural system (5. edición.). New York: Ivison, Blakeman, Taylor & Company.
Citación estilo ChicagoGray, Asa 1810-1888. Manual of the Botany of the Northern United States: Including the District East of the Mississippi and North of North Carolina and Tennessee, Arranged According to the Natural System. 5. edición. New York: Ivison, Blakeman, Taylor & Company, 1872.
Cita MLAGray, Asa 1810-1888. Manual of the Botany of the Northern United States: Including the District East of the Mississippi and North of North Carolina and Tennessee, Arranged According to the Natural System. 5. edición. New York: Ivison, Blakeman, Taylor & Company, 1872.