Dyfyniad APA

Cordero Cordero, G. (1980). Cyclical and linear conception of history.

Dyfyniad Arddull Chicago

Cordero Cordero, Gerardo. Cyclical and Linear Conception of History. 1980.

Dyfyniad MLA

Cordero Cordero, Gerardo. Cyclical and Linear Conception of History. 1980.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.