APA (7e ed.) Bronvermelding

Morton, M. L. (2002). The mountain white crowned sparrow: Migration and reproduction at high altitude. Cooper Ornithological Society.

Chicago (17e ed.) Bronvermelding

Morton, Martin L. The Mountain White Crowned Sparrow: Migration and Reproduction at High Altitude. Camarillo: Cooper Ornithological Society, 2002.

MLA (9e ed.) Bronvermelding

Morton, Martin L. The Mountain White Crowned Sparrow: Migration and Reproduction at High Altitude. Cooper Ornithological Society, 2002.