Cita APA

Posnette, A. (1963). Virus diseases of apples and pears. Commowealth agricultural bureaux.

Citación estilo Chicago

Posnette, A.F. Virus Diseases of Apples and Pears. England: Commowealth agricultural bureaux, 1963.

Cita MLA

Posnette, A.F. Virus Diseases of Apples and Pears. England: Commowealth agricultural bureaux, 1963.