Smith, Joan Macfarlance
Routledge & K. Paul, 1972
Buku Teks
Gorden, Reymond L.
Dorsey Press, 1975
Buku Teks
Gorden, Reymond L.
Dorsey Press, 1980
Buku Teks
Leighton, Jacqueline P., author
Oxford University Press, 2017
eBooks
Converse, Jean M., author
John Wiley & Sons, 1974
Buku Teks