Gaya APA
Economic activity and foreign trade. (1969).
Germany:
Published by the press.
Gaya Chicago
Economic activity and foreign trade.
text.
Germany:
Published by the press,
1969.
Tesis.
Gaya MLA
Economic activity and foreign trade.
text.
Germany:
Published by the press,
1969.
Tesis.
Gaya Turabian
Economic activity and foreign trade.
Germany:
Published by the press,
1969.
Tesis.