APA citiranje

O'Connell, A. P., Urban, M. K., & London, W. T. (1983). Naturally occurring infection of Pekin duck embryos by duck hepatitis B virus.

Citação norma Chicago

O'Connell, A P., M K. Urban, and W T. London. Naturally Occurring Infection of Pekin Duck Embryos By Duck Hepatitis B Virus. 1983.

MLA citiranje

O'Connell, A P., M K. Urban, and W T. London. Naturally Occurring Infection of Pekin Duck Embryos By Duck Hepatitis B Virus. 1983.