Cita APA (7a ed.)

Williams, J. G., & Friedmann, H. (1965). The pygmy honey-guide, Indicator pumilio Chapin in East Africa. Zenodo.

Cita Chicago Style (17a ed.)

Williams, John G., y Herbert Friedmann. The Pygmy Honey-guide, Indicator Pumilio Chapin in East Africa. Zenodo, 1965.

Cita MLA (9a ed.)

Williams, John G., y Herbert Friedmann. The Pygmy Honey-guide, Indicator Pumilio Chapin in East Africa. Zenodo, 1965.