Gleason, H.A.
An introduction to descriptive linguistics
Holt, Rinehart and Winston, 1955
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Applied Linguistics
Oxford, England : Oxford University Press
 Majalah, Jurnal, Buletin
Barker, Miltos E.
Linguistics : the work of the summer intitute of linguistics in the far east
Hongkong : Hongkong University, 1960/1961
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Lingua : international review of general linguistics
Amsterdam : North-Holland Publishing
 Majalah, Jurnal, Buletin
Lehmann, Winfred P.
Descriptive linguistics : an introduction
Random House, 1976
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