Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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