APA
International Seminar on Development Planning, International Seminar on Development Planning, . (1967). Planning the external sector. : .
Chicago
International Seminar on Development Planning, International Seminar on Development Planning, . 1967. Planning the external sector. : .
Harvard
International Seminar on Development Planning, International Seminar on Development Planning, . (1967). Planning the external sector. : .
MLA
International Seminar on Development Planning, International Seminar on Development Planning, . Planning the external sector. : . 1967.