Indonesia. Direktorat Djenderal Pengairan Dasar & Harza Engineering Company International. (1970). Indonesia irrigation rehabilitation project: Contract for consulting engineer's service between Republic of Indonesia and Harza Engineering Company International.
Chicago-referens (17:e uppl.)Indonesia. Direktorat Djenderal Pengairan Dasar och Harza Engineering Company International. Indonesia Irrigation Rehabilitation Project: Contract for Consulting Engineer's Service Between Republic of Indonesia and Harza Engineering Company International. [Djakarta, 1970.
MLA-referens (8:e uppl.)Indonesia. Direktorat Djenderal Pengairan Dasar och Harza Engineering Company International. Indonesia Irrigation Rehabilitation Project: Contract for Consulting Engineer's Service Between Republic of Indonesia and Harza Engineering Company International. 1970.