Pike, Kenneth Lee, 1912-2000
Summer Institute of Linguistics, 1957
Buku Klasik
Sommerfelt, Alf
Mouton, 1962
Buku Teks
by Benjamin Lee Whorf ; edited by John B. Carroll
John Wiley & Sons, 1956
Buku Teks SO
Esser, J.
Narr, 1981
Buku Teks SO
edited by Werner Abraham and Pieter Adrianus Verburg
Peter de Ridder Press, 1975
Buku Teks SO