International Correspondence Schools. (1905). Wool, wool washing, wool drying, burring and carbonizing, opening and mixing, wool oils and oiling, woollen carding, woollen spinning. I.C.S..
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)International Correspondence Schools. Wool, Wool Washing, Wool Drying, Burring and Carbonizing, Opening and Mixing, Wool Oils and Oiling, Woollen Carding, Woollen Spinning. London: I.C.S., 1905.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)International Correspondence Schools. Wool, Wool Washing, Wool Drying, Burring and Carbonizing, Opening and Mixing, Wool Oils and Oiling, Woollen Carding, Woollen Spinning. I.C.S., 1905.
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