(1960). Publishers' International Year Book: World Directory of Book Publishers. Alexander P. Wales.
Citazione stile Chigago Style (17a edizione)Publishers' International Year Book: World Directory of Book Publishers. London: Alexander P. Wales, 1960.
Citatione MLA (9a ed.)Publishers' International Year Book: World Directory of Book Publishers. Alexander P. Wales, 1960.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.