Sigma Book

Independently published

THE UNBROKEN SIGMA MALE: Lone Wolf Sigma Rules for Life, Sigma Mindset, Personality, Characteristics, and Understanding and Perfecting the World of the Independent Male

Independently published

Sigma Rizz: The Art of Being a Sigma Personality

McGraw-Hill

The Lean Six Sigma Pocket Toolbook: A Quick Reference Guide to Nearly 100 Tools for Improving Quality and Speed [Lingua inglese]

The Council for Six Sigma Certification

Six Sigma: A Complete Step-by-Step Guide: A Complete Training & Reference Guide for White Belts, Yellow Belts, Green Belts, and Black Belts

Societa Editrice Esculapio

Manuale Six Sigma per le Black Belt              

Stock Timing Tech Education LLC

The Sigma Investor: Stalk the Trade. Perfect Your Timing. How to Go from an Average Savage to Producing Massive Profits As a Legendary Stock Market Investor

Independently published

Journal Of A Sigma:: A Book for Independent Thinkers, Lone Wolves, and Quiet Leaders

Sigma: Book Two (The Alpha Series) (English Edition)

yash sharan

Sigma Rules : Rules that will make you sigma: Sigma rules grindset mindset book (English Edition)

The Sigma Book: A Collection of Sigma Rules To Live By (English Edition)