edited by David J. Maguire, Michael F. Goodchild, and David W. Rhind
Longman, 1991
Buku Teks
Linklater, Eric, 1899-1974, author
Robert Hale, 1984
Buku Teks
Merriam-Webster, 1995
Buku Referensi
G & C Merriam Co., 1961
Buku Referensi
G. & C. Merriam, 1943
Buku Referensi