Dyfyniad APA

Beveridge, W. (1968). Problem solving interviews. George allen and unwin.

Dyfyniad Arddull Chicago

Beveridge, W.E. Problem Solving Interviews. london: George allen and unwin, 1968.

Dyfyniad MLA

Beveridge, W.E. Problem Solving Interviews. George allen and unwin, 1968.

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