Hierarchy of needs is explained by?

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E6 Psychology Applied Sreevani 5e pp. 210-212, 208-210
E6 Psychology Applied Sreevani 6e Sem1 p. 211-213
Practise the full IGNOU PB Bsc Nsg Entrance-2017
Attempt every question from this paper in a timed mock, then review the full solution for each one.