Wongsaree, Chutchavarn, and Netchanok Sritoomma. 2021. “Relationship Model Among Environmental Supports, Knowledge Skills and Ability, Personality Characteristics, and Orientations on Personal Initiative of Head Nurses in Private Hospitals”. Journal of The Royal Thai Army Nurses 22 (2):241-51. https://he01.tci-thaijo.org/index.php/JRTAN/article/view/251667.