Hartley, S. F. (1972). Population quantity vs. quality: A sociological examination of the causes and consequences of the population explosion. Prentice-Hall.
Chicago-viite (17. p.)Hartley, Shirley Foster. Population Quantity Vs. Quality: A Sociological Examination of the Causes and Consequences of the Population Explosion. Englewood Cliffs, N.J.: Prentice-Hall, 1972.
MLA-viite (8. p.)Hartley, Shirley Foster. Population Quantity Vs. Quality: A Sociological Examination of the Causes and Consequences of the Population Explosion. Prentice-Hall, 1972.
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