Gaya APA

Tumpf, S, E. (1999). History of Philosophy: Socrates to Sartre, A (Sixth Edition). United States of America: Mc Graw Hill.

Gaya MLA

Tumpf, Samuel, Enoch. "History of Philosophy: Socrates to Sartre, A". Sixth Edition United States of America: Mc Graw Hill, 1999. Text.