Edgar H. Schein (1928) Psychologist
Variant: [ Organizational culture is] a pattern of shared basic assumptions that the group learned as it solved its problems of external adaptation and internal integration, that has worked well enough to be considered valid and, therefore, to be taught to new members as the correct way to perceive, think, and fell in relation to those problems.
Source: Organizational Culture and Leadership, 1985, p. 6