Lastrucci, Carlo L.
The scientific approach: basic principles of the scientific method
Schenkman, 1964
 Buku Teks
Hoover, Kenneth R., 1940-, author
The elements of social scientific thinking
Thomson, 2008
 Buku Teks
Wilson, E. Bright, author
An Introduction to scientific research
McGraw-Hill, 1952
 Buku Teks
Engels, F. E.
Socialism Utopian and scientific
Foreign Languages Publishing House, 1958
 Buku Teks
Barradas, Gerald
Scientific capitalism / Gerald Barradas
Pageant Press , 1956
 Buku Teks
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