Linguistic universals / edited by Ricardo Mairal and Juana Gil
Cambridge University Press, 2006
 eBooks
Sandler, Wendy
Sign language and linguistic universals
Cambridge University Press, 2006
 Buku Teks
Sign language and linguistic universals / Wendy Sandler, Diane Lillo-Martin
Cambridge University Press, 2006
 eBooks
Greenberg, Joseph H. (Joseph Harold), 1915-2001
Language universals with special reference to feature hierarchies
Mounton, 1976
 Buku Teks
Language acquisition and learnability / edited by Stefano Bertolo
Cambridge University Press, 2001
 eBooks