Citing the same source several times

Example

Studies indicate that lung cancer may grow more slowly in women. Lindell et al. (2015) showed that 85% of the lung tumours that took more than 400 days to double in volume were found in women. This result is a reflection of the higher incidence among women of forms of cancer with a slower disease progression such as alveolar cell carcinoma and adenocarcinoma, but Lindell et al. found that the time it took for the volume to double was greater in women, regardless of the histological type of lung cancer.

Lindell et al. (2015) studied four different histological types of lung cancer.

More information

• If a citation recurs in the same paragraph, you may omit the parentheses with the year if the author is mentioned in the text. If you don't mention the author in the text you should always include both author and year in the parentheses.
• If the citation recurs in a new paragraph, you should always state both author and year.