Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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