Cita APA (7a ed.)

Burkhardt, R. W. (1977). The spirit of system: Lamarck and evolutionary biology. Harvard University Press.

Cita Chicago Style (17a ed.)

Burkhardt, Richard W.. The Spirit of System: Lamarck and Evolutionary Biology. Cambridge, Massachusetts ; London: Harvard University Press, 1977.

Cita MLA (9a ed.)

Burkhardt, Richard W.. The Spirit of System: Lamarck and Evolutionary Biology. Harvard University Press, 1977.