United Nations Educational, Scientific and Cultural Organization. (1973). A guide to the measurement of marine primary production under some special conditions. Unesco.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United Nations Educational, Scientific and Cultural Organization. A Guide to the Measurement of Marine Primary Production Under Some Special Conditions. Paris: Unesco, 1973.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)United Nations Educational, Scientific and Cultural Organization. A Guide to the Measurement of Marine Primary Production Under Some Special Conditions. Unesco, 1973.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.