You can find the original source for Maslow's hierarchy of needs at:
Maslow, A. H. (1943) 'A theory of human motivation', Psychological Review, 50 (4), pp. 370–396. https://doi.org/10.1037/h0054346
A short introductory description of the theory and common criticisms can be found on page 228 of the following book:
Mullins and Christy (2016) Management and organisational behaviour. 11th edn. Harlow: Pearson Education.
You can find both of these via Library Search.
