APA (7e ed.) Bronvermelding

Não informado. (1931). Journal of calendar reform. International World Calendar Association.

Chicago (17e ed.) Bronvermelding

Não informado. Journal of Calendar Reform. New York: International World Calendar Association, 1931.

MLA (8e ed.) Bronvermelding

Não informado. Journal of Calendar Reform. International World Calendar Association, 1931.

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