O`hare, Michael
Van Nostrand Reinhold, 1983
Buku Teks
Smith, Lawrence, 1893-
Houghton Miffiln, 1959
Buku Teks
edited by Karen Fog Olwig and Kirsten Hastrup
Routledge, 1997
Buku Teks
Sanderson, Peter C.
Pan Books, 1972
Buku Teks
Sanderson, Peter C.
Pan Books , 1969
Buku Teks