Milroy, Patrick, author
Ward Lock Book, 1994
Buku Referensi
MacEwan, Grant, author
Western Producer Prairie Books , 1977
Buku Teks
Prentice, William E., author
McGraw-Hill Education , 2017
Buku Teks
Peni Mutalib, author
1988
UI - Tesis (Membership)
d`Alpuget, Blanche
Schwartz, 1984
Buku Teks