Ryan, Richard M.; Frederick, Christina (1 September 1997). "On Energy, Personality, and Health: Subjective Vitality as a Dynamic Reflection of Well-Being". Journal of Personality. 65 (3): 529–565. doi:10.1111/j.1467-6494.1997.tb00326.x. PMID9327588. S2CID18190895.
nih.gov
pubmed.ncbi.nlm.nih.gov
Ryan, Richard M.; Frederick, Christina (1 September 1997). "On Energy, Personality, and Health: Subjective Vitality as a Dynamic Reflection of Well-Being". Journal of Personality. 65 (3): 529–565. doi:10.1111/j.1467-6494.1997.tb00326.x. PMID9327588. S2CID18190895.
semanticscholar.org
api.semanticscholar.org
Ryan, Richard M.; Frederick, Christina (1 September 1997). "On Energy, Personality, and Health: Subjective Vitality as a Dynamic Reflection of Well-Being". Journal of Personality. 65 (3): 529–565. doi:10.1111/j.1467-6494.1997.tb00326.x. PMID9327588. S2CID18190895.