APA (7e ed.) Bronvermelding

Não informado. (1930). Extension service review. Science and Education Administration.

Chicago (17e ed.) Bronvermelding

Não informado. Extension Service Review. Washington: Science and Education Administration, 1930.

MLA (8e ed.) Bronvermelding

Não informado. Extension Service Review. Science and Education Administration, 1930.

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