Heie, O. E. (1967). Studies on fossil aphids (Homoptera: Aphidoidea): Especially in the Copenhagen collection of fossils in Baltic amber.
Chicago-viite (17. p.)Heie, Ole E. Studies on Fossil Aphids (Homoptera: Aphidoidea): Especially in the Copenhagen Collection of Fossils in Baltic Amber. Copenhagen, 1967.
MLA-viite (8. p.)Heie, Ole E. Studies on Fossil Aphids (Homoptera: Aphidoidea): Especially in the Copenhagen Collection of Fossils in Baltic Amber. 1967.
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