edited by Thomas Clark ... [and others]
Writers digest Books, 1994
Buku Referensi
edited by Jean M. Fredette
Writer`s Digest Books, 1988
Buku Teks SO
Lederer, William J
W W Norton, 1954
Koleksi Publik
Cox, Ailsa
Routledge, 2005
Buku Teks SO
Schumacher, Michael
Writer's Digest Books, 1990
Buku Teks SO