Gaya APA
Madge, S., Burn, H. (1994).
Crows and jays : a guide to the crows, jays, and magpies of the world .
London:
Christopher Helm.
Gaya MLA
Madge, Steve., Burn, Hilary.
"Crows and jays : a guide to the crows, jays, and magpies of the world".
London:
Christopher Helm,
1994.
Text.