Cita APA (7a ed.)

Gosler, A. (1987). Sexual dimorphism in the summer bill-length of the Great Tit. Nederlandse Ornithologische Unie.

Cita Chicago Style (17a ed.)

Gosler, A. Sexual Dimorphism in the Summer Bill-length of the Great Tit. Nederlandse Ornithologische Unie, 1987.

Cita MLA (9a ed.)

Gosler, A. Sexual Dimorphism in the Summer Bill-length of the Great Tit. Nederlandse Ornithologische Unie, 1987.