Cita APA (7th ed.)
Walpole, R. E. (1968). Introduction to statistics. Macmillan.
Cita Chicago (17th ed.)
Walpole, Ronald E. Introduction to Statistics. London: Macmillan, 1968.
Cita MLA (9th ed.)
Walpole, Ronald E. Introduction to Statistics. Macmillan, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.