APA
, . (1978). INTERNATIONAL CONSULTATION on IPIL - IPIL research. USA: National Academy.
Chicago
, . 1978. INTERNATIONAL CONSULTATION on IPIL - IPIL research. USA: National Academy.
Harvard
, . (1978). INTERNATIONAL CONSULTATION on IPIL - IPIL research. USA: National Academy.
MLA
, . INTERNATIONAL CONSULTATION on IPIL - IPIL research. USA: National Academy. 1978.