Beal, F. E. L. Some Common Birds Useful to the Farmer (1926 edition).
Chicago (17e ed.) BronvermeldingBeal, F. E. L. Some Common Birds Useful to the Farmer (1926 Edition).
MLA (9e ed.) BronvermeldingBeal, F. E. L. Some Common Birds Useful to the Farmer (1926 Edition).
Let op: Deze citaties zijn niet altijd 100% accuraat.