Cita APA (7th ed.)
Umbgrove, J. H. F. (1949). Structural History of the East Indies. Univ.Pr.
Cita Chicago (17th ed.)
Umbgrove, Johannes Herman Frederik. Structural History of the East Indies. Cambridge: Univ.Pr, 1949.
Cita MLA (9th ed.)
Umbgrove, Johannes Herman Frederik. Structural History of the East Indies. Univ.Pr, 1949.
Atenció: Aquestes cites poden no estar 100% correctes.