Geoffrey, Leech N.
A linguistic guide to english poetry
Longmans, 1993
 Buku Teks
Linguistic Analysis
Linguistic Analysis, 1996
 Majalah, Jurnal, Buletin
American Speech : A quarterly of Linguistic Usage
Columbia : Columbia University Press and American Dialect Society
 Majalah, Jurnal, Buletin
Linguistic representation of english vocabulary attrition
 Artikel Jurnal
Edwards, Allen L.
Statistical analysis
Rinehart and Winston , 1958
 Buku Teks SO