Hardin, G. (1969). Population evolution birth-control: A college of controversial readings. San Francisco: W. H. Freeman.
استشهاد بنمط شيكاغوHardin, Garrett. Population Evolution Birth-control: A College of Controversial Readings. San Francisco: W. H. Freeman, 1969.
MLA استشهادHardin, Garrett. Population Evolution Birth-control: A College of Controversial Readings. San Francisco: W. H. Freeman, 1969.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.