Citazione APA

Clarke, A. C. (1973). Report on planet three and other speculations. New American library.

Stile di citazione Chicago

Clarke, Arthur C. Report on Planet Three and Other Speculations. Newyork: New American library, 1973.

Citazione MLA

Clarke, Arthur C. Report on Planet Three and Other Speculations. New American library, 1973.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.