Rubin, Sol
Oceana Publications, 1976
Buku Teks
Moreland, Canoll C.
Oceana Publications, 1957
Buku Teks
Taylor, Sandie
Routledge, 2019
Buku Teks
Llewellyn, Karl N.
Little, Brown and Company, 1960
Buku Teks
Houghteling, James L.
Harcourt, Brace & Word, 1968
Buku Teks