MORPURGO, M. (2015). AN EAGLE IN THE SNOW. HAPERCOLLINS PUBLISHERS.
芝加哥风格引文MORPURGO, MICHAEL. AN EAGLE IN THE SNOW. GREAT BRITAIN: HAPERCOLLINS PUBLISHERS, 2015.
MLA引文MORPURGO, MICHAEL. AN EAGLE IN THE SNOW. HAPERCOLLINS PUBLISHERS, 2015.
警告：这些引文格式不一定是100％准确.