Gaya APA
:, S, I, T, U, S., ROCA, A, [.
(1993).
linguistic contact and diversity
.
Berlin:
Mouton de Gruyter.
Gaya MLA
:, SPANISH, In, The, United, States., ROCA, Ana, [ed.].
"linguistic contact and diversity".
Berlin:
Mouton de Gruyter,
1993.
Buku.