APA
Yan L S, .Invisible earnings from the international rubber trade. : Proceedings of the International Rubber Marketing Conference, 1983, Kuala Lumpur, Malaysia, p252-260.
Chicago
Yan L S, .Invisible earnings from the international rubber trade. : Proceedings of the International Rubber Marketing Conference, 1983, Kuala Lumpur, Malaysia, p252-260.
Harvard
Yan L S, .Invisible earnings from the international rubber trade. : Proceedings of the International Rubber Marketing Conference, 1983, Kuala Lumpur, Malaysia, p252-260.
MLA
Yan L S, .: Proceedings of the International Rubber Marketing Conference, 1983, Kuala Lumpur, Malaysia, p252-260. .