Lofland, John, author
Wadsworth, 1984
Buku Teks
Berman, Jules J., author
Elsevier, 2013
Buku Teks
Andrain, Charles F., author
Macmillan, 1995
Buku Teks
edited by Piotr Cap and Urszula Okulska
John Benjamins Publishing, 2013
Buku Teks
by Brian M. Moon ... [et al.]
CRC Press, 2011
Buku Teks