Cita APA (7a ed.)

Skou, P. (1986). The geometroid moths of North Europe (Lepidoptera: Drepanidae and Geometridae. Brill.

Cita Chicago Style (17a ed.)

Skou, Peder. The Geometroid Moths of North Europe (Lepidoptera: Drepanidae and Geometridae. Leiden [etc.]: Brill, 1986.

Cita MLA (9a ed.)

Skou, Peder. The Geometroid Moths of North Europe (Lepidoptera: Drepanidae and Geometridae. Brill, 1986.