Edensor, Tim
Berg Publishers, 2002
Buku Teks SO
edited by Louise Lamphere, Helena Ragone and Patricia Zavella
Routledge, 1997
Buku Teks SO
Hulsey, Nathan
Emerald Publishing Limited, 2020
eBooks
edited by Garry Wills
George Braziller, 1966
Buku Teks SO
Lechner, Frank J.
Blackwell, 2005
Buku Teks SO