Frank, P. (1946). International Encyclopedia of Unified Science. Chicago: The University of Chicago Press.
استشهاد بنمط شيكاغوFrank, Philipp. International Encyclopedia of Unified Science. Chicago: The University of Chicago Press, 1946.
MLA استشهادFrank, Philipp. International Encyclopedia of Unified Science. Chicago: The University of Chicago Press, 1946.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.