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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Indonesia. Direktorat Djenderal Pengairan Dasar و 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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Indonesia. Direktorat Djenderal Pengairan Dasar و Harza Engineering Company International. Indonesia Irrigation Rehabilitation Project: Contract for Consulting Engineer's Service Between Republic of Indonesia and Harza Engineering Company International. 1970.