Cita APA (7th ed.)

Gould, J., & Sharpe, R. B. (1883). Ptilopus wallacei, Wallace's Fruit-Pigeon [Pl. 55]. Zenodo.

Cita Chicago (17th ed.)

Gould, John, i Richard Bowdler Sharpe. Ptilopus Wallacei, Wallace's Fruit-Pigeon [Pl. 55]. Zenodo, 1883.

Cita MLA (9th ed.)

Gould, John, i Richard Bowdler Sharpe. Ptilopus Wallacei, Wallace's Fruit-Pigeon [Pl. 55]. Zenodo, 1883.