Dyfyniad APA

Edited by Onsrud , H. (1999). Geographic information research. Taylor and Francis.

Dyfyniad Arddull Chicago

Edited by Onsrud , Harlan. Geographic Information Research. London: Taylor and Francis, 1999.

Dyfyniad MLA

Edited by Onsrud , Harlan. Geographic Information Research. Taylor and Francis, 1999.

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