Executive coach and public speaker Gerry Valentine provides a breakdown of the general steps required to achieve executive presence (online article).
This paper by Kathryn Christie at the Queens University Centre for Social Impact reviews the elements of integrity and how it can be seen in leadership.
The paper offers ways to develop integrity by understanding your personal values; to act with integrity by leading with your values; and to repair trust when mistakes are made. Building an environment in which integrity can thrive is an essential role for leaders and managers alike. Research shows that when employees feel safe to take interpersonal risks and are being led and managed morally, they will be more willing to morally lead and manage each other, particularly when inappropriate behaviour takes place.
https://smith.queensu.ca/insight/whitepapers/leading_with_integrity