霍爾 ((Hall, Barry))

Listen in & speak out[有聲]. Level3 by: Crosthwaite, Andrew; Hall, Barry; Vickers, David; 戈克拉斯維特 ((Crosthwaite, Andrew)); 維克斯 ((Vickers, David)); 華藝數位股份有限公司; 霍爾 ((Hall, Barry)) (Electronic resources) , [作]