Cita APA (7th ed.)
Engel, L. (1967). How to buy stocks (4th ed., rev.). Little, Brown.
Cita Chicago (17th ed.)
Engel, Louis. How to Buy Stocks. 4th ed., rev. Boston: Little, Brown, 1967.
Cita MLA (9th ed.)
Engel, Louis. How to Buy Stocks. 4th ed., rev. Little, Brown, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.