The persistent problems of philosophy :
an introduction to metaphysics through the study of modern systems /
by Mary Whiton Calkins.
APA Citation
Calkins, M. Whiton. (19081907). The persistent problems of philosophy: an introduction to metaphysics through the study of modern systems. 2nd rev. ed. New York: MacMillan.
MLA Citation
Calkins, Mary Whiton, 1863-1930. The Persistent Problems of Philosophy: an Introduction to Metaphysics Through the Study of Modern Systems. 2nd rev. ed. New York: MacMillan, 19081907.
Warning: These citations may not always be complete (especially for serials).