Lammers, W. J. (2005). Fundamentals of behavioral research William J. Lammers, Pietro Badia. Thomson Wadsworth.
Cita Chicago Style (17a ed.)Lammers, William J. Fundamentals of Behavioral Research William J. Lammers, Pietro Badia. Thomson Wadsworth, 2005.
Cita MLA (8a ed.)Lammers, William J. Fundamentals of Behavioral Research William J. Lammers, Pietro Badia. Thomson Wadsworth, 2005.
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