McLaren, Peter
Routledge, 1995
Buku Teks
edited by Graeme Duncan
Edward Arnold, 1978
Buku Teks SO
edited by Francis W. Rushing, and Carole Ganz Brown
Westview Press, 1986
Buku Teks SO
Eve Ng
Palgrave Macmillan Cham, 2022
eBooks
Bozeman, Adda B.
Princeton University Press, 1960
Buku Teks