Cita APA (7th ed.)

Clausen, R. T. (1975). Sedum of North America north of the Mexican Plateau. Cornell Uiversity Press.

Cita Chicago (17th ed.)

Clausen, Robert Theodore. Sedum of North America North of the Mexican Plateau. Ithaca, N.Y.: Cornell Uiversity Press, 1975.

Cita MLA (8th ed.)

Clausen, Robert Theodore. Sedum of North America North of the Mexican Plateau. Cornell Uiversity Press, 1975.