Kokusai Kyōryoku Jigyōdan. (1988). The Study on the integrated regional development plan for the northern part of Sumatra: Progress report II. JICA.
Chicago-viite (17. p.)Kokusai Kyōryoku Jigyōdan. The Study on the Integrated Regional Development Plan for the Northern Part of Sumatra: Progress Report II. [Jakarta]: JICA, 1988.
MLA-viite (8. p.)Kokusai Kyōryoku Jigyōdan. The Study on the Integrated Regional Development Plan for the Northern Part of Sumatra: Progress Report II. JICA, 1988.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.