APA (7e ed.) Bronvermelding

Porter, E. H. The Turn of the Tide: The Story of How Margaret Solved Her Problem.

Chicago (17e ed.) Bronvermelding

Porter, Eleanor H. The Turn of the Tide: The Story of How Margaret Solved Her Problem.

MLA (9e ed.) Bronvermelding

Porter, Eleanor H. The Turn of the Tide: The Story of How Margaret Solved Her Problem.

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