APA
Ehrlich P. R., Hanski I., . (2004). On the wings of checkerspots. Oxford: Oxford University Press.
Chicago
Ehrlich Paul R, Hanski Ilkka, . 2004. On the wings of checkerspots. Oxford: Oxford University Press.
Harvard
Ehrlich P. R., Hanski I., . (2004). On the wings of checkerspots. Oxford: Oxford University Press.
MLA
Ehrlich Paul R, Hanski Ilkka, . On the wings of checkerspots. Oxford: Oxford University Press. 2004.