Robert K. Greenleaf Books

Seeker and Servant

By Larry C. Spears, Anne T. Fraker, Robert K. Greenleaf

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On Becoming a Servant Leader

By Larry C. Spears, Don M. Frick, Robert K. Greenleaf

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On Becoming a Servant-Leader, a collection of previously unpublished work by Greenleaf, demonstrates his personal and professional philosophy, which postulates that true leaders are those who lead...

The Servant Leader Within

By Robert K. Greenleaf

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Servant Leadership

By Robert K. Greenleaf

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SERVANT LEADERSHIP A Journey Into the Nature Of Legitimate Power and Greatness

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The Servant Teacher

By Robert Greenleaf

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Teacher as servant

By Robert K. Greenleaf

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Servant leadership

By Robert K. Greenleaf

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Brain Based Teaching

By Dr. Robert K. Greenleaf

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Memory Recall the Brain Learning

By Doris Wells Papanek, Robert K. Greenleaf

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.