American Psychological Association
Spinoza, Baruch, & Shirley, Samuel ( 1982 ). Ethics and Selected Letters ( 00 ed. ). Hackett Publishing Co.
Modern Language Association
Spinoza, Baruch and Shirley, Samuel. Ethics and Selected Letters . Hackett Publishing Co. 1982
Chicago Citation
Spinoza, Baruch and Shirley, Samuel. Ethics and Selected Letters . 00 .Indiana
: Hackett Publishing Co, 1982.
American Medical Association
Spinoza, Baruch and Shirley, Samuel. Ethics and Selected Letters . Hackett Publishing Co; 1982.