Gaya APA

TIMMER, C, P. (2003). A WORLD WITHOUT AGRICULTURE (Edisi Revisi). America: LIBEARY CONGRES OF CATALOGING PUBILCATION.

Gaya MLA

TIMMER, C., PETTER. "A WORLD WITHOUT AGRICULTURE". Edisi Revisi America: LIBEARY CONGRES OF CATALOGING PUBILCATION, 2003. Art Original.