Ohlsson. Lennart. (1980). Engineering trade specialization of Sweden and other industrial countries: A study of trade adjustment mechanisms of factor proportions theory. North-Holland.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ohlsson. Lennart. Engineering Trade Specialization of Sweden and Other Industrial Countries: A Study of Trade Adjustment Mechanisms of Factor Proportions Theory. Amsterdam: North-Holland, 1980.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Ohlsson. Lennart. Engineering Trade Specialization of Sweden and Other Industrial Countries: A Study of Trade Adjustment Mechanisms of Factor Proportions Theory. North-Holland, 1980.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.