The persistent problems of philosophy,
an introduction to metaphysics through the study of modern systems,
by Mary Whiton Calkins ...
APA Citation
Calkins, M. Whiton. (1917). The persistent problems of philosophy: an introduction to metaphysics through the study of modern systems. 4th rev. ed. New York: The Macmillan Company; [etc., etc.].
MLA Citation
Calkins, Mary Whiton, 1863-1930. The Persistent Problems of Philosophy: an Introduction to Metaphysics Through the Study of Modern Systems. 4th rev. ed. New York: The Macmillan Company; [etc., etc.], 1917.
Warning: These citations may not always be complete (especially for serials).