APA (7e ed.) Bronvermelding

Não informado. Sunflower newsletter. International Sunflower Association.

Chicago (17e ed.) Bronvermelding

Não informado. Sunflower Newsletter. Amsterdam: International Sunflower Association.

MLA (8e ed.) Bronvermelding

Não informado. Sunflower Newsletter. International Sunflower Association.

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