Healey, J. F. (2007). The essentials of statistics: A tool for social research. Belmont, CA : Thomson/Wadsworth.
Cita Chicago (17th ed.)Healey, Joseph F. The Essentials of Statistics: A Tool for Social Research. Belmont, CA : Thomson/Wadsworth, 2007.
Cita MLA (9th ed.)Healey, Joseph F. The Essentials of Statistics: A Tool for Social Research. Belmont, CA : Thomson/Wadsworth, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.