Mezirow, Jack D.
Scarecrow Press , 1963
Buku Teks
Wileden, Arthur F.
Bedminster Press , 1970
Buku Teks
Selo Soemardjan, author
Cornell University , 1963
Buku Teks
Willson, Jack D.
McGraw-Hill , 1967
Buku Teks SO
edited by Gove Hambidge ; foreword by Teodoro Moscosco, introd. by Paul G. Hoffman
Frederick A. Praeger, 1964
Buku Teks