APA (7e ed.) Bronvermelding

Não informado. (1887). Bulletin of the Pennsylvania Agricultural Experiment Station. Pennsylvania Agricultural Experiment Station.

Chicago (17e ed.) Bronvermelding

Não informado. Bulletin of the Pennsylvania Agricultural Experiment Station. Harrisburg, Pa: Pennsylvania Agricultural Experiment Station, 1887.

MLA (8e ed.) Bronvermelding

Não informado. Bulletin of the Pennsylvania Agricultural Experiment Station. Pennsylvania Agricultural Experiment Station, 1887.

Let op: Deze citaties zijn niet altijd 100% accuraat.