Παραπομπή σε μορφή APA (7η εκδ.)

(1981). A glimpse of the past: A tourist's guide to industrial trails, slate quarries, mines, mills. Cardiff: Wales Tourist Board.

Παραπομπή σε μορφή Chicago (17η εκδ.)

A Glimpse of the Past: A Tourist's Guide to Industrial Trails, Slate Quarries, Mines, Mills. Cardiff: Wales Tourist Board, 1981.

Παραπομπή σε μορφή MLA (8th εκδ.)

A Glimpse of the Past: A Tourist's Guide to Industrial Trails, Slate Quarries, Mines, Mills. Cardiff: Wales Tourist Board, 1981.