Botha, Rudolf P.
Mouton, 1968
Buku Teks SO
Autorengruppe, Prager
Scriptor, 1973
Buku Teks SO
Chomsky, Noam
Mountion, 1972
Buku Teks SO
Tomalin, Marcus
Cambridge University Press, 2006
Buku Teks SO
Tomalin, Marcus
Cambridge University Press, 2006
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