APA استشهاد

Blauberg,I V. (1977). Systems theory: Philosophical and methodological problems. Progress Publishers.

استشهاد بنمط شيكاغو

Blauberg,I V. Systems Theory: Philosophical and Methodological Problems. Moscow: Progress Publishers, 1977.

MLA استشهاد

Blauberg,I V. Systems Theory: Philosophical and Methodological Problems. Progress Publishers, 1977.