Dyfyniad APA

Berry, B. J. L. (1976). The geography of economic systems. Englewood Cliffs, N.J: Prentice-Hall.

Dyfyniad Arddull Chicago

Berry, Brian J. L. The Geography of Economic Systems. Englewood Cliffs, N.J: Prentice-Hall, 1976.

Dyfyniad MLA

Berry, Brian J. L. The Geography of Economic Systems. Englewood Cliffs, N.J: Prentice-Hall, 1976.

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