Crew, Frederick, author
Random House, 1987
Buku Teks
Crews, Frederick, author
Random House, 1984
Buku Teks
Hachenburger, Petra
Routledge, 2000
Buku Referensi
edited by Michael Rines
Gower in Association with Marketing Magazine, 1981
Buku Teks
Mark Aronoff, Janie Rees-Miller
Wiley Blackwell, 2017
Buku Teks