(1975). Problems of contemporary logic ; Methodological problems of science ; Philosophy and the study of religion ; Linguistics and anthropology ; Contemporary metaphysics ; Contemporary studies in the history of philosophy. Sofia Pr..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Problems of Contemporary Logic ; Methodological Problems of Science ; Philosophy and the Study of Religion ; Linguistics and Anthropology ; Contemporary Metaphysics ; Contemporary Studies in the History of Philosophy. Sofia: Sofia Pr., 1975.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Problems of Contemporary Logic ; Methodological Problems of Science ; Philosophy and the Study of Religion ; Linguistics and Anthropology ; Contemporary Metaphysics ; Contemporary Studies in the History of Philosophy. Sofia Pr., 1975.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.