Jonathan H. Turner
Springer, 2012
eBooks
Bogardus, Emory S.
Macmillan, 1954
Buku Teks
Goode, William J.
Tata McGraw-Hill, 1977
Buku Teks
Jamrozik, Adam, author
Cambridge University Press, 1998
eBooks
by Ronald Freedman [and others]; with a chapter by Guy E. Swanson
Henry Holt, 1952
Buku Teks