APA-referens (7:e uppl.)

Lessmark, O. (1983). Competition between perch (Perca fluviatilis) and roach (Rutilus rutilus) in south Swedish lakes.

Chicago-referens (17:e uppl.)

Lessmark, Olof. Competition Between Perch (Perca Fluviatilis) and Roach (Rutilus Rutilus) in South Swedish Lakes. 1983.

MLA-referens (8:e uppl.)

Lessmark, Olof. Competition Between Perch (Perca Fluviatilis) and Roach (Rutilus Rutilus) in South Swedish Lakes. 1983.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.