Gaya APA
Ponsell, M, L., Ponsell, D, F. (1999).
Ponsells of the Balearic Islands of Spain and their American descendants .
deu:
.
Gaya MLA
Ponsell, Mary, Louise.., Ponsell, David, Francis,.
"Ponsells of the Balearic Islands of Spain and their American descendants".
deu:
,
1999.
print.