Poortinga, Y. H. (1977). Basic problems in cross-cultural psychology: Selected papers from the Third International Congress of the International Association for Cross-Cultural Psychology held at Tilburg University, Tilburg, the Netherlands, July 12-16, 1976. Swets & Zeitlinger B.V.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Poortinga, Ype H. Basic Problems in Cross-cultural Psychology: Selected Papers from the Third International Congress of the International Association for Cross-Cultural Psychology Held at Tilburg University, Tilburg, the Netherlands, July 12-16, 1976. Amsterdam: Swets & Zeitlinger B.V, 1977.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Poortinga, Ype H. Basic Problems in Cross-cultural Psychology: Selected Papers from the Third International Congress of the International Association for Cross-Cultural Psychology Held at Tilburg University, Tilburg, the Netherlands, July 12-16, 1976. Swets & Zeitlinger B.V, 1977.