Formal theories of organization have been taught in management courses for many years, and there is an extensive literature on the subject. The textbook principles of organization — hierarchical structure, authority, unity of command, task specialization, division of staff and line, span of control, equality of responsibility and authority, etc. — comprise a logically persuasive set of assumptions which have had a profound influence upon managerial behavior.

p. 15 (p. 21 in 2006 edition) - The Human Side of Enterprise (1960)