Gilbers, Dirk Gilbert
Rijksuniversiteit, 1956
Buku Teks
edited by Max Coltheart
Psychology Press, 1996
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Cheun, Sang Buom
Pan Korean Book Corporation, 1975
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Juliana Liusiska
2015
UI - Makalah dan Kertas Kerja
John M. Anderson, Charles Jones editors
North-Holland , 1974
Buku Teks