Gaya APA
Gasset, Jose Ortegay. ().
History as a system and other essays... .
s.l.:
s.n..
Gaya Chicago
Gasset, Jose Ortegay.
History as a system and other essays....
s.l.:
s.n.,
.
Text.
Gaya MLA
Gasset, Jose Ortegay.
History as a system and other essays....
s.l.:
s.n.,
.
Text.
Gaya Turabian
Gasset, Jose Ortegay.
History as a system and other essays....
s.l.:
s.n.,
.
Print.