Higgins, L. G., & Riley, N. D. (1970). A Field guide to the butterflies of Britain and Europe QL555 .A1 H. Collins.
芝加哥风格引文Higgins, Lionel George, 与 Norman Denbigh Riley. A Field Guide to the Butterflies of Britain and Europe QL555 .A1 H. London: Collins, 1970.
MLA引文Higgins, Lionel George, 与 Norman Denbigh Riley. A Field Guide to the Butterflies of Britain and Europe QL555 .A1 H. Collins, 1970.
警告：这些引文格式不一定是100％准确.