APA (7e ed.) Bronvermelding
Wheeler, G. (1903). The Butterflies of Switzerland and the Alps of Central Europe.
Chicago (17e ed.) Bronvermelding
Wheeler, George. The Butterflies of Switzerland and the Alps of Central Europe. London, 1903.
MLA (9e ed.) Bronvermelding
Wheeler, George. The Butterflies of Switzerland and the Alps of Central Europe. 1903.
Let op: Deze citaties zijn niet altijd 100% accuraat.