By: STEPHANE GARNIER
By: STEPHEN R. COVEY,
By: ROBERT WALDINGER, MARC SCHULZ
By: SHEILA HEEN , BRUCE PATTON , DOUGLAS STONE
By: TIMOTHY FERRISS
By: FABRICE MIDAL
By: WILLIAM SCHUTZ
By: DAVID R. HAWKINS
By: FLORENT TANLET
By: PATRICE JULIEN
By: YOR PFEIFFER
By: ELODIE CREPEL
By: TIBO INSHAPE
By: NICOLE LEPERA
By: Céline Géara Thomas (Direction), Collectif
By: JEAN-PHILIPPE LACHAUX
By: JADE ARESTAN-MALLET
By: LARRY WINGET
By: PAULINE FREIERMUTH