W. Keith Campbell Books

The narcissism epidemic
The narcissism epidemic

By Jean M. Twenge

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Citing a rise in such factors as cosmetic surgery, status-related debt, and misrepresented Facebook profiles, a cautionary report on the increase of unhealthy ego-related behaviors examines its act...

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New Science of Narcissism
New Science of Narcissism

By Carolyn Crist

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Narcisismo
Narcisismo

By W. Keith Campbell, Carolyn Crist

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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.

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