Landis, James M.
Jale University Press, 1966
Buku Teks
White, James R. H.
McGraw-Hill, 1975
Buku Teks
Spradley, James P.
Halt, Rinehart and Winston, 1979
Buku Teks
Gavin, James M.
Random Hause, 1968
Buku Teks
Austin, James C.
Twayne , [1964]
Buku Teks