Numbers.
[By] Robert Indiana [and] Robert Creeley. (Edited by Dieter Honisch. Translation of the poems [into German] by Klaus Reichert.)
APA Citation
Indiana, R., McClure, M., Creeley, R. (1968). Numbers. Stuttgart: Domberger.
MLA Citation
Indiana, Robert, 1928-, Michael McClure, and Robert Creeley. Numbers. Stuttgart: Domberger, 1968.
Warning: These citations may not always be complete (especially for serials).