Hilbert, David, author
Open Court, 1990
Buku Referensi
Sturgen, Bogdan
"Jona VEB: Gustav Fischer Verlag ,1972",
Buku Teks
Jakobson, Roman, author
Berlin Akademic-Verlag 1960
Buku Teks
Jakobson, Roman, author
Berlin Akademic-Verlag 1960
Buku Teks
Nicod, Jean
Routledge & Kegan Paul, 1930
Buku Teks