Unzueta Portilla, M. (1972). La terra sigillata de la Cueva de Peña Forua (Forua-Vizcaya). [s.n.].
Chicago Style (17th ed.) CitationUnzueta Portilla, Mikel. La Terra Sigillata De La Cueva De Peña Forua (Forua-Vizcaya). [S.l.]: [s.n.], 1972.
MLA (9th ed.) CitationUnzueta Portilla, Mikel. La Terra Sigillata De La Cueva De Peña Forua (Forua-Vizcaya). [s.n.], 1972.
Warning: These citations may not always be 100% accurate.