福格尔 & 岳卓. (2008). 假如爱犬会说话: If your dog could talk…. 科学普及出版社.
Dyfyniad Arddull Chicago福格尔 and 岳卓. 假如爱犬会说话: If Your Dog Could Talk…. 科学普及出版社, 2008.
Dyfyniad MLA福格尔 and 岳卓. 假如爱犬会说话: If Your Dog Could Talk…. 科学普及出版社, 2008.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.