(1981). A glimpse of the past: A tourist's guide to industrial trails, slate quarries, mines, mills. Cardiff: Wales Tourist Board.
Citazione stile Chigago Style (17a edizione)A Glimpse of the Past: A Tourist's Guide to Industrial Trails, Slate Quarries, Mines, Mills. Cardiff: Wales Tourist Board, 1981.
Citatione MLA (8a ed.)A Glimpse of the Past: A Tourist's Guide to Industrial Trails, Slate Quarries, Mines, Mills. Cardiff: Wales Tourist Board, 1981.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.