APA (7th ed.) Citation
M, N., & R, B. (1995). Validity: A concept at the heart of research. British Journal of Nursing, 4(9), 530-534.
Chicago Style (17th ed.) Citation
M, Nolan, and Behi R. "Validity: A Concept at the Heart of Research." British Journal of Nursing 4, no. 9 (1995): 530-534.
MLA (9th ed.) Citation
M, Nolan, and Behi R. "Validity: A Concept at the Heart of Research." British Journal of Nursing, vol. 4, no. 9, 1995, pp. 530-534.
Warning: These citations may not always be 100% accurate.