Lehman, Harvey Christian. "19. Increasing Longevity and Future Achievement". Age and Achievement, Princeton: Princeton University Press, 1953, pp. 308-323. https://doi.org/10.1515/9781400886753-021
Lehman, H. (1953). 19. Increasing Longevity and Future Achievement. In Age and Achievement (pp. 308-323). Princeton: Princeton University Press. https://doi.org/10.1515/9781400886753-021
Lehman, H. 1953. 19. Increasing Longevity and Future Achievement. Age and Achievement. Princeton: Princeton University Press, pp. 308-323. https://doi.org/10.1515/9781400886753-021
Lehman, Harvey Christian. "19. Increasing Longevity and Future Achievement" In Age and Achievement, 308-323. Princeton: Princeton University Press, 1953. https://doi.org/10.1515/9781400886753-021
Lehman H. 19. Increasing Longevity and Future Achievement. In: Age and Achievement. Princeton: Princeton University Press; 1953. p.308-323. https://doi.org/10.1515/9781400886753-021