Cita APA (7a ed.)

American Institute of Planners & Ewald, W. R. (1970). Environment and change: The next fifty years (1st ed., 2nd printing.). Indiana University Press.

Cita Chicago Style (17a ed.)

American Institute of Planners y William R. Ewald. Environment and Change: The Next Fifty Years. 1st ed., 2nd printing. Bloomington [etc.]: Indiana University Press, 1970.

Cita MLA (9a ed.)

American Institute of Planners y William R. Ewald. Environment and Change: The Next Fifty Years. 1st ed., 2nd printing. Indiana University Press, 1970.