एपीए उद्धरण

Grebler, M. U., & Naef-Daenzer, B. Brood overlap and male ornamentation in the double-brooded barn swallow.

शिकागो स्टाइल उद्धरण

Grebler, Martin U., और Beat Naef-Daenzer. Brood Overlap and Male Ornamentation in the Double-brooded Barn Swallow.

एमएलए उद्धरण

Grebler, Martin U., और Beat Naef-Daenzer. Brood Overlap and Male Ornamentation in the Double-brooded Barn Swallow.