Library of Congress. Federal Research Division & Hanratty, D. M. (1991). Ecuador: A country study (3rd ed.). Federal Research Division, Library of Congress.
Dyfyniad Arddull ChicagoLibrary of Congress. Federal Research Division and Dennis Michael Hanratty. Ecuador: A Country Study. 3rd ed. [Washington, D.C.]: Federal Research Division, Library of Congress, 1991.
Dyfyniad MLALibrary of Congress. Federal Research Division and Dennis Michael Hanratty. Ecuador: A Country Study. 3rd ed. Federal Research Division, Library of Congress, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.