RL Blackman. (1994). Aphids on the world's trees: An identification and information guide. CAB international.
Chicago Edition CitationRL Blackman. Aphids on the World's Trees: An Identification and Information Guide. UK: CAB international, 1994.
MLA Edition CitationRL Blackman. Aphids on the World's Trees: An Identification and Information Guide. CAB international, 1994.
Warning: These citations may not always be 100% accurate.