Broad, C.D.
Scientific thought
Littlefield, Adams, 1959
 Buku Teks
Lastrucci, Carlo L.
The scientific approach: basic principles of the scientific method
Schenkman, 1964
 Buku Teks
Hoover, Kenneth R., 1940-
The elements of social scientific thinking
Thomson, 2008
 Buku Teks
Wilson, E. Bright
An Introduction to scientific research
McGraw-Hill, 1952
 Buku Teks
Engels, F.E.
Socialism Utopian and scientific
Foreign Languages Publishing House, 1958
 Buku Teks